Take it easy on the new guy

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bulldogbones

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Feb 12, 2011
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44
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USA
Sorry for the short book, but better you know why and how I came to this idea.

I currently own an 06 apex ( 1.76 track, mono skid beefup kit, half baked powder coated, oilites all around, and other stuff) and my wife has an 08 nytro. Oh and the trusty back up my 98 vmax 600 xtc that I am currently driving after trying to ride my apex on its handle bars last week.

For the last month I have been toying with the idea ( it's just an idea right now ) of putting a 700 srx into a 08 rev or possibly a 13 rev with the r motion. Don't get me wrong I love my apex but I am starting to get tired of having a severely nose heavy sled, that and yamaha pissed me off with the new 2014 Viper. That cat chassis is junk.... But that's a different story. And I know the biggest hurdle I will have too overcome is packing triple triple pipes into the nose of a rev ( like putting a 454 into a vw bug ).

So here are my questions, and feel free to post a link to a thread that already answers any of my questions.

Was 2001 the strongest/highest hp blue head 700 triple triple that was made ? If not what was.

What were the down side to these engines?

Can the 700 be made into a trail sled or was it designed more as a lake/ long run sled?
 

Will respond with a short book of my own. Welcome to the site. Yes 01 was highest HP year stock out of the box but 00&02 were pretty close and 98-99 can get up there numbers rather easily (porting,shave heads) With the differant big bore kits any 98-02 can make HUGE power. Yes they are aimed towards being a long legged lake racer BUT are still very trail rideable (I have 3 700's and a 600 that are all trail machines) As far as a rev platform transplant....I have no idea. I do remeber seeing a red head tripple (non-power valve) transplant into a newer 4 stroker chassis (yamaha.....I think) When it comes down to brass tax we are all only limited by 2 things. 1. Imigination 2. Funds to act on our imagination
 
I would use a 01 redhead engine. mine runs right with my bros. heavily modified [aftermarket head, mr. viper port , fancy clutch and 136 track srx. we are about even everytime we race. my sxr is bone stock with the exception of a new track with studs, and transfer rods. I don't know if my sled is a freak or what, but that single pipe would be a lot easier to package. not to mention that the redheads last forever, Yamaha snowmobiles best engine. [my personal opinion!]
 
I have an 01 srx 700 and it works well. I share your hatred with the 2014' yamacat. If you have a friend that's a machinist then it may make the conversion much easier
 
Would it be safe to say the blue head ( three separate heads ) that are the triple triples will weigh more since it requires 3 pipes. And that the redhead triple single will weigh less, since it has one can?

So if both engines had custom pipes built for them so they would fit into a rev front end ( along with port and polish, and jetting ) which would be higher hp and have better longevity?
 
I saw a conversion done to a rev using a triple Doo engine,it was wedged in there pretty tight but looked killer.This was done by a company out west here in Canada but for the life of me I can't remember the name of the place.If it can be done with a Doo engine then surely with some fab work a Yammy triple would work.
 
I gotta say if they can cram a doo 800 triple in a rev then a 700 yamaha should work

resized_20101114185442136_27886.jpg


But my question still remains which engine will give me better hp/longevity. Or is it a case of one or the other?
 
98-99 srx700 engine makes around 137-138hp

2000-02 srx engines make right at 140hp

both have the "blue heads" and have powervalves, they are 69mm bore with a 64mm stroke. they are a very good engine with excellant reliability.

viper engine is a cross of a srx, same exact bore and stroke, just a little differnt cylinders and a black monohead. They make around 125-128hp, used a single pipe stock. They have a little more aggressive porting on the cylinders then a srx does and a tad more compression. Its also a popular engine to triple pipe and will churn out 150hp with triples no other mods. these usually have more problems then a srx does because of the increased compression and the stock cdi box has alot more ign timing.. leading to high heat= detonation on todays lower octane fuel



The "red headed" sx,sxr engines make around 113-114hp, they are a 70.5mm bore with a shorter 59.6mm stroke, no powervalves, also a stock single pipe engine. Its also a very good reliable engine but you can see your starting off with alot lower hp level.( this engine will need to turn more rpm to make the same power as the srx engine would)

any engine can vary a couple hp either way but you get the "idea on hp" of the yamaha triple engines to choose from. Just depends on dyno used and how it was checked. I mostly always do accelaration sweeps, some use heat soaked numbers which will drop a couple hp from the heat soak, but either way you get the idea.

If the guy below can run even up with a stock sxr to a modded srx, then the srx needs some tuning still as something is off with it, until a red head has triples it cant match the srx powerwise..
 
06' how about you walk across the street and ask D&D if they want to make two sets of triple pipes that will fit into a doo ;)!
 
mrviper700 said:
98-99 srx700 engine makes around 137-138hp

2000-02 srx engines make right at 140hp

both have the "blue heads" and have powervalves, they are 69mm bore with a 64mm stroke. they are a very good engine with excellant reliability.

viper engine is a cross of a srx, same exact bore and stroke, just a little differnt cylinders and a black monohead. They make around 125-128hp, used a single pipe stock. They have a little more aggressive porting on the cylinders then a srx does and a tad more compression. Its also a popular engine to triple pipe and will churn out 150hp with triples no other mods. these usually have more problems then a srx does because of the increased compression and the stock cdi box has alot more ign timing.. leading to high heat= detonation on todays lower octane fuel



The "red headed" sx,sxr engines make around 113-114hp, they are a 70.5mm bore with a shorter 59.6mm stroke, no powervalves, also a stock single pipe engine. Its also a very good reliable engine but you can see your starting off with alot lower hp level.( this engine will need to turn more rpm to make the same power as the srx engine would)

any engine can vary a couple hp either way but you get the "idea on hp" of the yamaha triple engines to choose from. Just depends on dyno used and how it was checked. I mostly always do accelaration sweeps, some use heat soaked numbers which will drop a couple hp from the heat soak, but either way you get the idea.

If the guy below can run even up with a stock sxr to a modded srx, then the srx needs some tuning still as something is off with it, until a red head has triples it cant match the srx powerwise..
Click to expand...

So from what your saying, I am better off with a 98-02 blue head, best hp and reliability. My biggest hurdle will be cramming the triple pipes in.
 
I just merely gave you the information to make your choice from, youll have to decide what power level you want to begin with. Some of the engines can be bought cheaper then others so youll just need to research it.
I am fairly certain youll be fabbing up a pipe/or pipes for any engine to fit in the chassis anyways.

good luck on the build and dont be afraid to post some pics of your progress, i love the custom stuff....... :sled1:
 
Hey guys, I will know in the next month if this project will be a go or NO. I am self employed so this time of the year is my lean season. If I did do anything cosmetic I would try and pick up a black doo and get GO!!!!! In blue decals. Something like the yamaha race go!!! Bike. But stickers and looks are a long way off. If th build is a go then ill run across town and talk to D&D and ask them what there thoughts would be in regards to building pipes to fit into the sled.
 
Jaws used to make the conversion kit to fit the 809 doo triple into a rev chassis. It was the engine mounts and pipes. This was the original rev, not the xp.

If you get this done please put some details. Would be nice to have a rev xp that didnt need a rebuild every 5000 km
 
mrviper700 said:
98-99 srx700 engine makes around 137-138hp

2000-02 srx engines make right at 140hp

both have the "blue heads" and have powervalves, they are 69mm bore with a 64mm stroke. they are a very good engine with excellant reliability.

viper engine is a cross of a srx, same exact bore and stroke, just a little differnt cylinders and a black monohead. They make around 125-128hp, used a single pipe stock. They have a little more aggressive porting on the cylinders then a srx does and a tad more compression. Its also a popular engine to triple pipe and will churn out 150hp with triples no other mods. these usually have more problems then a srx does because of the increased compression and the stock cdi box has alot more ign timing.. leading to high heat= detonation on todays lower octane fuel



The "red headed" sx,sxr engines make around 113-114hp, they are a 70.5mm bore with a shorter 59.6mm stroke, no powervalves, also a stock single pipe engine. Its also a very good reliable engine but you can see your starting off with alot lower hp level.( this engine will need to turn more rpm to make the same power as the srx engine would)

any engine can vary a couple hp either way but you get the "idea on hp" of the yamaha triple engines to choose from. Just depends on dyno used and how it was checked. I mostly always do accelaration sweeps, some use heat soaked numbers which will drop a couple hp from the heat soak, but either way you get the idea.

If the guy below can run even up with a stock sxr to a modded srx, then the srx needs some tuning still as something is off with it, until a red head has triples it cant match the srx powerwise..
Click to expand...



goddamn there are some knowledgeable folks on here. wow. :)
 
The knowledge comes from years of working with them. You could always do the redhead with single pipe and have mrviper port it and it will have plenty of power and reliability.
 
This is funny, when I showed my 10 year old son the pic of the new viper for next year the first thing out of his mouth was " how much work would it be to put a three cylinder 2 stroke motor in that dad, that thing would be the boss" I just smiled and kind of got think about how much work it really would be lol. Apparently I'm not the only one thinking about putting a three cylinder 2 stroke into a rider forward chassis
 
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