nelsonhouse
Member
i am running an 8dn belt.
will this make any difference from an 8ch belt?
will this make any difference from an 8ch belt?
running the 8ch will lower your shift out rpms! You need to take some weight out of those clickers ,they are to heavy! you should be running around 42-43 grams of weight and run those pipes around 9100-9300 rpm for max . performance!!also turn fuel screws out to 3 or put 50 pilots in er.
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thats as close as your gonna get till you get a new red primary spring, you can lower the engagement down a bit by adding more washers, more heel weight will lower engagement speed. Your top speed is a bit lower because you have the secondary clutch tighter.
I merely gave you options to use so you can at least ride it with somewhat power appllied, no other spring will match the red h/c one so buy 2 of those.
once you get your new spring in and your rear clutch set back to around 60-70 on snow it will run like its supposed to. In the meantime you can play with the heel weight as the engagement speed will be the same with the red and the grey they are both the same there, so add more washers to bolt to lower the engagement speed, right around 4000 rpm is good for snow, 4200 is fine if your hooking up no problem.
Theres 1 other band aid fix you can do is swap out the rear sec helix to one of 48-40,or 50-40 and that will raise up your rpm, and allow you to back off the sec spring tension to get better topend speed.
I merely gave you options to use so you can at least ride it with somewhat power appllied, no other spring will match the red h/c one so buy 2 of those.
once you get your new spring in and your rear clutch set back to around 60-70 on snow it will run like its supposed to. In the meantime you can play with the heel weight as the engagement speed will be the same with the red and the grey they are both the same there, so add more washers to bolt to lower the engagement speed, right around 4000 rpm is good for snow, 4200 is fine if your hooking up no problem.
Theres 1 other band aid fix you can do is swap out the rear sec helix to one of 48-40,or 50-40 and that will raise up your rpm, and allow you to back off the sec spring tension to get better topend speed.
nelsonhouse
Member
weight
the lightest weight i can go with the h/c is 52.5 grams. that's what it weighed, with nothing in the tip, centre and heel. i would have to start grinding away at the h/c to lower it's weight.
Has any body tried grinding the h/c?
yammy said:
the lightest weight i can go with the h/c is 52.5 grams. that's what it weighed, with nothing in the tip, centre and heel. i would have to start grinding away at the h/c to lower it's weight.
Has any body tried grinding the h/c?
nelsonhouse
Member
.5g
i will go add .5 grams to the heel. changing the heel weight is easy. no need to remove the clutch. i do not have any other helix's. i can order one when i order the red spring.
mrviper700 said:
i will go add .5 grams to the heel. changing the heel weight is easy. no need to remove the clutch. i do not have any other helix's. i can order one when i order the red spring.
no need to buy a helix, just a need to buy a new red h/c spring. It was merely a way to get you out riding, and also..dont go grinding on the h/c weights, you dont need to lighten them up, you just need to replace the sacked out red spring. It will run with the weight you have in there, will also work alot better upstairs/topend when you can move the secondary clutch back to 60-70 with the new red spring back up in the front clutch.
nelsonhouse
Member
is benderracing a good place to buy these red hc springs.
$29.95
$29.95
nelsonhouse
Member
i ordered the red hc from benderracing. lets see how long it takes to get here.
nelsonhouse
Member
i have added .5 grams to the heel.
it has lowered the engagement.
engagement is now 4200 rpm.
changed the spark plugs too, better throttle response. they must have needed changing.
it has lowered the engagement.
engagement is now 4200 rpm.
changed the spark plugs too, better throttle response. they must have needed changing.
nelsonhouse
Member
good, hows it run now with a new spring? rpm?
nelsonhouse
Member
snow
i'm going to put it in tomorrow. i had to go for a ride today.
it was way too nice out there to be working on my yamaha. lots of snow out there. 
my son is out there flying around with his friends now. it's going to be his yamaha next year, 
i'm waiting for the new 2014 yamaha 
the redhead does go to 8700 rpm to 8800 rpm for a bit then settles down to 8500 rpm. that's with the grey spring. i wonder how much hp there is at 8500 rpm.
i'm going to put it in tomorrow. i had to go for a ride today.
it was way too nice out there to be working on my yamaha. lots of snow out there. my son is out there flying around with his friends now. it's going to be his yamaha next year, i'm waiting for the new 2014 yamaha the redhead does go to 8700 rpm to 8800 rpm for a bit then settles down to 8500 rpm. that's with the grey spring. i wonder how much hp there is at 8500 rpm.
ya, enjoy the snow, gotta ride while you can.
the red will bump up the rpm its quite a bit stronger then the grey one
plenty of power there for a kid even at 8500rpm..........
ride safe!
the red will bump up the rpm its quite a bit stronger then the grey one
plenty of power there for a kid even at 8500rpm..........
ride safe!
nelsonhouse
Member
nelsonhouse
Member
I went for a ride today. I had a closer look a the rpms. Engagement is 4500 rpm.
Shift rpm is 9000 rpm on bare ice. I was thinking of removing the centre weight.
And adding more heel weight to bring the engagement back down to 4000 rpm.
How many feet or meters does it take a 700 sx with pipes to get to 9000 rpm.
Shift rpm is 9000 rpm on bare ice. I was thinking of removing the centre weight.
And adding more heel weight to bring the engagement back down to 4000 rpm.
How many feet or meters does it take a 700 sx with pipes to get to 9000 rpm.
nelsonhouse said:
just add more washer to the heel dont remove the center weight or youll be running empty weights to run 9000 rpm, that tells me its not tuned in or the motor isnt making power if you have to run empty weights.
you can add up to 6-7 washers plus the lock washer on the heel to get engagement down
it should come up to 9000 about 150-200ft from the start if the sled is tuned and set up correctly.
the other thing that is kinda strange going on is both the silver and the red both have the same engagement rate, they are both 230, so you had 4200 engagement at post #29 and then again in #34, now you have 4500rpm engagement with no other chage, it would have only increased your peak rpm as the silver is a 230/330, and the red is a 230/360 spring. I am not sure if its a error on your part reading your tach or what but the spring wouldnt have raised the engagement 300rpm, its the same start.
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nelsonhouse
Member
yeah i found it strange that the engagement went up from 4200 rpm to 4500 rpm. i'm guessing 1 gram of weight on the heel should bring it down close to 4000 rpm. it takes me more than 150-200 ft to get to 9000 rpm unless it's on bare ice. on hard pack i'm not sure but i am sure it's more than 200 ft. it's a little hard to look at the tach after 200 ft. our lake is getting some big snow drifts lots of snow. gonna have to find a better place to test. sled is at 8500 rpm at less than 200 ft .
then your likely overshifting it, you need another 10 degrees on the rear spring wrap. run it at 70-80, no more then 80 on the back. if you spin the track its gonna overshift it when you catch traction again if your too loose on the rear clutch.
for snow i like 60-70 twist but if the helix is aggressive you may need 80 to hang onto the belt
if it goes right to 8500rpm out of the gate then climbs to 9000 its not that bad, thats good.
for snow i like 60-70 twist but if the helix is aggressive you may need 80 to hang onto the belt
if it goes right to 8500rpm out of the gate then climbs to 9000 its not that bad, thats good.
nelsonhouse
Member
i checked out the secondary and it was at 80 degree twist. so i twisted the secondary to 90 just to see what would happen.And the engagement is still at 4500 rpm. i did not bother the heel weight. the shift is about 8700-8800 rpm after about 200 ft. then settles down to 8500-8600 rpm. this is testing out on the lake trails. the top speed is down a bit more. i'm going to change the twist back to 80 degrees. and it only climbs up to 9000 rpm on bare ice or on a really hard pack trail. there are only two locations with those conditions. the temp today is -8 C with light snow 1 inch. i am going to change the jetting as soon as my jets come in. the weather is going to be warmer now -10 C to -1 C. i think a tempa flow or a dial-a-jet would be great this time of year. the temp is going to change a lot from day to day.
yamalars
Member
I would try a helix with a more shallow finish angle to get it to shift @ 9000.nelsonhouse said:
Then you can likely back off the spring to 60-70 twist and regain top speed.
What brand helix do you run now?