auji700triple
New member
thanks, i got some work ahead of me now.... hopefully i can cure the Deto. I say ill have her runnin good by the end of next month... takes awhile to dail in a sled.
AJ if the mag is running that much hotter than the other 2 it is jetted too lean. The head mod is for colant cooling. Your egt is for exhaust temps. Go up 1 full jet size, ie 162.5 to 165, and try it again. For a 150 bucks to get your head modded, you might look for a peak or mega power head. Paul
AJ
I did some reaserch on the vari flow. If you have the brass jet in the inlet tube, you are already cutting your fuel by 10%. If you want to make it really pig fat quick to see what happens, take the inlet vent tube off, and runn one to under the hood, not the air box, or just pull the inlet out of your air box. That is like unhooking the ventlines. You will be way over jetted then. I am considering running mine this way, to avoid the High speed lean spots caused by airbox preasure. I will go from 165 mains to 155 to start. If you read all the info on the vari flow, and understand it, I think it can be uded to a great advantage. Paul
I did some reaserch on the vari flow. If you have the brass jet in the inlet tube, you are already cutting your fuel by 10%. If you want to make it really pig fat quick to see what happens, take the inlet vent tube off, and runn one to under the hood, not the air box, or just pull the inlet out of your air box. That is like unhooking the ventlines. You will be way over jetted then. I am considering running mine this way, to avoid the High speed lean spots caused by airbox preasure. I will go from 165 mains to 155 to start. If you read all the info on the vari flow, and understand it, I think it can be uded to a great advantage. Paul
Mac
Member
This problem has been solved by others!
Stop riding the sled until fixed except for testing. Do yourself a favor and remove the Vari Flow. This device does not belong on a piped Viper. AJ please take your time and listen to J. Simons or Pat Hauck or whoever you decide to select for your head Mod. You MUST do the head mod because your compression is to high at 13 and a half to one. Lastly do not blow that motor. I thought you were going postal on us when last years motor blew. Good luck.
--mac--
Stop riding the sled until fixed except for testing. Do yourself a favor and remove the Vari Flow. This device does not belong on a piped Viper. AJ please take your time and listen to J. Simons or Pat Hauck or whoever you decide to select for your head Mod. You MUST do the head mod because your compression is to high at 13 and a half to one. Lastly do not blow that motor. I thought you were going postal on us when last years motor blew. Good luck.
--mac--
auji700triple
New member
You guys are Correct, im not riding my sled Until The problam is fixxed... i Think i might Bail on the Vari-Flow and fix all Cut out holes in my carb and In my airbox. I think That might be the problam. Also im going to try and Vent my Lines to the bulkhead some how...
Question, How do i Vent my Air-Lines to my BulkHead and Keep them secure, TieWraps??? My buddie Use's a Vari-Flow and has no problam.. Powervalve-700 Does, difference he has is that he has the variflow attached to the Airbox unlike mine i got it Screwd to my dash. I think you guys are right, I might ditch the vari-flow tonite.
Also... on a Brighter note, I found out my sleds not taking oil. I filled her to the top to see if she would Drink it but nope. Im so Glad i mixxed HEAVY on the first Tank. Woha!! So im going to pick at it wit the bys and see about it, Very weird! i drove it around for 2 days and the oil line hasn't moved. i didn't bleed it properly , instead i put oil in the tank, Phew!! Besides that, i got to Tighten up my track, Get the head mod and Ditch the vari-flow and sell it maybe on the forums!! Im not sure....
Keep this thread Alive, im going to do more tests tomorow. As for jetting i can't go any richer, 170 main and 60 pilots. So ill be soon turining to 55Pto 55mid and 60mag also 162.5pto 162.5main and 165main..... that should be right there. Ill post in a bit about it. Thanks...!
Question, How do i Vent my Air-Lines to my BulkHead and Keep them secure, TieWraps??? My buddie Use's a Vari-Flow and has no problam.. Powervalve-700 Does, difference he has is that he has the variflow attached to the Airbox unlike mine i got it Screwd to my dash. I think you guys are right, I might ditch the vari-flow tonite.
Also... on a Brighter note, I found out my sleds not taking oil. I filled her to the top to see if she would Drink it but nope. Im so Glad i mixxed HEAVY on the first Tank. Woha!! So im going to pick at it wit the bys and see about it, Very weird! i drove it around for 2 days and the oil line hasn't moved. i didn't bleed it properly , instead i put oil in the tank, Phew!! Besides that, i got to Tighten up my track, Get the head mod and Ditch the vari-flow and sell it maybe on the forums!! Im not sure....
Keep this thread Alive, im going to do more tests tomorow. As for jetting i can't go any richer, 170 main and 60 pilots. So ill be soon turining to 55Pto 55mid and 60mag also 162.5pto 162.5main and 165main..... that should be right there. Ill post in a bit about it. Thanks...!
redsnake3
New member
aj, i know someone who is looking for a variflow, let me know if your getting rid of it.
redsnake3 said:
Yes, and in the end it probably is the better way to do things.... BUT as with all the Holtzman products you MUST ESTABLISH PROPER BASELINE JETTING in order for them to work properly. Since the vipers come vented in the box this would be problematic, the belly vented SRX'x would provide a bit of jetting guidance but not much since the CDI curve and porting is so different.
Probably the quickest safe way to change over would be to get it completely dialed with wash and plug readings then note egt's for all cylinders in those conditions vent to the pan and jet to re-establish those reading in the same conditions. Time consuming at best and if you've already got it dialed why screw with it unless you buy inot Olav Aaen's argument that the box vented cards can't feed a big HP/very modded motor
JeepTherapy
New member
Again, I say I am following your build very closely as yours is the closest to what I am going to do with mine. I don't know anything about jetting except what I have read but I understand what I have read.auji700triple said:
Isn't the jump to the 162.5 a huge jump from the 170's? I have a set of 165/55s. I am thinking I need to buy a couple different size jets to tune with. I was thinking 167.5 and the 162.5s. It is also my understanding that after the head mod your jetting should be straight across the board?
ExpertXViper
New member
maxdlx said:
Paul this was one thing I was wondering about with the Peak Heads, is they only comes with the 22cc domes for sea level runners. Which is your raising compression on the PTO and lowering it on the MID, MAG cylinders. So does this mean to run the PTO cylinder more rich or WHAT????? I thought I'd be running the Megas by now but there was a mix up in the shipping, so its prolly gunna be another 2 weeks delay cause it coming from Canada. So I'm setting up for the Peak Head just in chase we ever get snow. Whats everyones opinion on this???
I'd jett it at 165 straight across, and keep a very close eye on the plugs and wash. Paul
ExpertXViper
New member
Yea my plan WAS All 165 mains, Pilot 50 PTO, 47.5 MID, MAG, Clip Pos. 4 PTO, 3.5 MID, MAG. And see where I'm with that, cause I did as much as I could for keeping her cool SRX Cooler, SRX Base, Opti-cool head gasket, and the Peak Head for now. Opti-cool will only be used with the peak head cause the cooling holes are the same design as a stock head, wide open unlike the the Megas cooling holes are much smaller. Which I'll be using with a stock head gasket with the middle layer removed.
redsnake3
New member
i didnt think yamaha had a 167.5 main, i thought it jumped to 170 from 165.
ExpertXViper
New member
redsnake3 said:
Pretty sure your right cause I went to my dealer wanting one for my PTO side. They didnt come up with anything on there computer, in stock or to order.
auji700triple
New member
Well, My friend Has his viper, You know ther Dragula. Well his Jetting is spot on. We have all have the same snow/air conditions so i might Jet to his specs as were running pretty much the exact same thing. but i Do Have the 165's so ill throw them in there for now to see if it makes a little difference.... The question is, Will i notice a huge change with the vari-flow off?? i really can't tell if its doing anything when i try and adjust it with the Knob. so i might cover up the holes, Patch the airbox and Vent the lines to the Atmosphere in the bottem of the sled. Then if that don't work ill think into getting the Head mod... And if that dont work, well maybe i can turn to the clutching. But it seems to Be real close.
depending on how you engage it is around 4,800-5,000. I didn't have much problams with it last night. i was was doin little small wot runs in back ditchs and rpms were up to 8, and no Dcs..... but on my way home going up the road i nipped her then went to 3/4 throttle and i got the first warning.
I was told it could be where my oil pump isn't working. A buddie said the outside jugs arn't getting the oil as needed. He said i could seize the bearings on the pto and mag side. So i havn't drove it since.
So what im going to do shortly is Change my jetting to 165's across the board, Take the vari-flow off, Patch the holes and vent the lines to the atmosphere in the bottem of the sled Then fix the Oil Pump... Hopefully it works. But i do have a plan B, Modded head.
Well this might have somethign to do with it. During that day i dind't have Anyproblams with the Detonation But as the day turned into night it got colder and Then i seen the first warning light, Maybe its the Colder temps Flowing into my Airbox...? im just throwing that out there.
depending on how you engage it is around 4,800-5,000. I didn't have much problams with it last night. i was was doin little small wot runs in back ditchs and rpms were up to 8, and no Dcs..... but on my way home going up the road i nipped her then went to 3/4 throttle and i got the first warning.
I was told it could be where my oil pump isn't working. A buddie said the outside jugs arn't getting the oil as needed. He said i could seize the bearings on the pto and mag side. So i havn't drove it since.
So what im going to do shortly is Change my jetting to 165's across the board, Take the vari-flow off, Patch the holes and vent the lines to the atmosphere in the bottem of the sled Then fix the Oil Pump... Hopefully it works. But i do have a plan B, Modded head.
Well this might have somethign to do with it. During that day i dind't have Anyproblams with the Detonation But as the day turned into night it got colder and Then i seen the first warning light, Maybe its the Colder temps Flowing into my Airbox...? im just throwing that out there.
Last edited:
auji700triple
New member
To be honest with yah, the vari-flow could be half the problam with the Detonation.
Oh yeah, Plugs are black.... Everytime i let it warm up she fouls a plug due to the amount of oil in the gas maybe..?
im too scared to run her to that first warning Purposly to check the jetting, is it worth going to the first warning light just to check jetting?
Oh yeah, Plugs are black.... Everytime i let it warm up she fouls a plug due to the amount of oil in the gas maybe..?
im too scared to run her to that first warning Purposly to check the jetting, is it worth going to the first warning light just to check jetting?
Last edited:
auji700triple said:
quit blaming the variflow....remove it from the equation. unplug the line in the airbox and unplug the vacuum source on the slide and cap it with a vacuum plug form the auto-parts store..... then it is no longer part of the equation and the carbs are vented in the stock location...
once you get your oil pump working again start with the pipe builders recomended jetting.
auji700triple
New member
Well... Got some more bad news but on the other hand good news too...
Took off my jets Found the ones i need and put them in. Looking for the oil problam But all the lines Seem to be full of oil and the Cable is Connected and working but the oil dont seem to be getting pulled into the motor. I thought there was a Vacum seal but the air hose is not blocked by anything.....
got my Vari-flow removed and coverd the hole in my dash with a sticker, lol. all i got to do now is fit a small screw in the top part of the carb for the vari flow and then silicone it. Then i might put it on Totallyamaha.
Question, Did they stop making the Vari-flow?
Also going threw the sled i noticed the bolt from my secondary Was on the bottem of the sled along with 1 of the shims. Im SOO glad i found this problam before it was too late... So im workin out all the bugs and getting her dialed in...
how much you say it is for me to send out one of my heads for the head mod to bnender and get them to cut it for DCS? this head is a older one that dosn't have the DCS option. Thanks.,
Took off my jets Found the ones i need and put them in. Looking for the oil problam But all the lines Seem to be full of oil and the Cable is Connected and working but the oil dont seem to be getting pulled into the motor. I thought there was a Vacum seal but the air hose is not blocked by anything.....
got my Vari-flow removed and coverd the hole in my dash with a sticker, lol. all i got to do now is fit a small screw in the top part of the carb for the vari flow and then silicone it. Then i might put it on Totallyamaha.
Question, Did they stop making the Vari-flow?
Also going threw the sled i noticed the bolt from my secondary Was on the bottem of the sled along with 1 of the shims. Im SOO glad i found this problam before it was too late... So im workin out all the bugs and getting her dialed in...
how much you say it is for me to send out one of my heads for the head mod to bnender and get them to cut it for DCS? this head is a older one that dosn't have the DCS option. Thanks.,
..SNAKEBIT..
VIP Member
before I went thru all the work of removing and pluging holes
I would disconnect and try, (just leave it mounted)
you need to try one thing at a time to figure it out
sounds to me like you are running in circles
1st figure out why your oil pump is not working
2nd drain premix and put in premium (ran my cpr piped for 2 years without head mod
would still be running it that way but a guy on TY traded me heads, he sold sled)
3rd un hook vari-flow to get base-line jetting
do test runs mid-range and when top end (or when light comes on)
look at wash and rejet and re-test
then hook vari-flow back up and try check wash
of course this is JUST MY OPINION
I would disconnect and try, (just leave it mounted)
you need to try one thing at a time to figure it out
sounds to me like you are running in circles
1st figure out why your oil pump is not working
2nd drain premix and put in premium (ran my cpr piped for 2 years without head mod
would still be running it that way but a guy on TY traded me heads, he sold sled)
3rd un hook vari-flow to get base-line jetting
do test runs mid-range and when top end (or when light comes on)
look at wash and rejet and re-test
then hook vari-flow back up and try check wash
of course this is JUST MY OPINION
JeepTherapy
New member
It is my understanding that the head mod has more of a bearing on the newer DCS equipped Vipers if you want the DCS to stay hooked up...SNAKEBIT.. said:
I think you miss the boat a little by having the non DCS head modded unless they can add a DCS fitting on it? Have you heard back from Bender yet? Very unfortunate time of year to try and get tech support.
Did you do Benders mods to the air box? That is one more area that I am a little unsure of. I don't really want to hack up my airbox like that and am curious how much of a bearing that has on performance.
Do you have any more videos of how your viper sounds with the benders on it?
auji700triple
New member
DCS IS GONE!?? bye bye Vari-flow ??
Man i got GOOD news. I changed the Jetting to 162.5(pto)162.5(mid) and 165(mag) and took off the vari-flow altogeather. The DCS is Gone so FAR, i think it was the The vari-flow man. The ligth hasnt blinked and i've been up to 8000Rpm and constantly reving the sled. Tonite was warm so that might have somethign to do with it...
Another question
Q: before i took the vari-flow Off and the jetting change the PTO was always the Coldest Jug. Now with the Jetting Change and the Vari-flow off the PTO is the 2nd hottest and the mid is the coolest, NOT by MUCH but i donno if thats a problam.
Sled is working So Snappy, so much throttle Responce its amazing! Havn't done a WOT run yet tomorrow i think ill do that.
the Oil problam was just a kinked Air Line so there was a Suction on the oil, so thats not a big deal. Im real Happy that the sled is preforming so much better!!
Is there any intrest for a Vari-flow??? Lmfao!
JeepTherapy : the Airbox Is gutted and as my friend said, benders mod.
I will Get a video Tomorrow and post it here and show how my sled Preforms.
Man i got GOOD news. I changed the Jetting to 162.5(pto)162.5(mid) and 165(mag) and took off the vari-flow altogeather. The DCS is Gone so FAR, i think it was the The vari-flow man. The ligth hasnt blinked and i've been up to 8000Rpm and constantly reving the sled. Tonite was warm so that might have somethign to do with it...
Another question
Q: before i took the vari-flow Off and the jetting change the PTO was always the Coldest Jug. Now with the Jetting Change and the Vari-flow off the PTO is the 2nd hottest and the mid is the coolest, NOT by MUCH but i donno if thats a problam.
Sled is working So Snappy, so much throttle Responce its amazing! Havn't done a WOT run yet tomorrow i think ill do that.
the Oil problam was just a kinked Air Line so there was a Suction on the oil, so thats not a big deal. Im real Happy that the sled is preforming so much better!!
Is there any intrest for a Vari-flow??? Lmfao!
JeepTherapy : the Airbox Is gutted and as my friend said, benders mod.
I will Get a video Tomorrow and post it here and show how my sled Preforms.
Last edited: