Chain Adjustment

[DigitalFusion]

ugh. now I need to pull the exhaust AGAIN and loosen my damned chaincase.

 

[canadianhunter]

I'm going out to do it again now. Done 50 miles ago.

 

[yamyfreak]

The pro cross has the torque control system which causes the engine and jackshaft to move in sync but causes the other end of the jackshaft to move. The bearing was designed to move, seen it for myself. This caused the chain to lose tension on torque load. Vipers don't have that issue. Jack shaft is solid at both ends. We shouldn't have an issue with chain tension if adjusted properly. Seems like no one has an answer as to adjust the chain. I set finger tight and went 1 turn back, to be safe after reading the forums. Did do the 1/4 turn back and howled like crazy when off the gas. ?? Might just go to the SyncroDrive belt system and drop the dam reverse and not worry about chain cases blowing up.

 

[**sj**]

YF you are correct...that back and forth (driveline)
movement of the jackshaft TCL on one end allowed a lot of movement and spherical bearing in the chaincase was the pivot point essentially..this caused the chian to tighten (ala chinese handcuffs)
not sure on your version of the procross...but there is chassis movement (vs driveline) which could be affecting this as well.

we explored different kinds and quality of bearings...different jackshafts...different motor mounts...different gear and chain....after all of it I can say we werent a fan of the reverse servo system...we would have loved to have the yam dependable and controllable lever action with linkage..

 

[yamyfreak]

Not my Pro Cross but my buddies. He installed dam near solid motor mounts to reduce the flex on the engine and surprisingly enough not that much more vibrations. Also removed the reverse servo and extra gears. No problems since then. This was an 1100 Turbo. Have not had an issue with my Viper yet but don't want it detonating when I'm on the gas at 190 horses.

 

[**sj**]

ya one thing I didnt like about the turbo 1100 pc is the oil resi is agnesium...doesnt wick heat out....super heated oil and high AIT's dont help detonation....I had a turbo and manifold blanket on mine..along with straight exhaust..


the more solid mounts have caused the welds on the heat exchanger to leak coolantsince the material there is so thin (heat exchanger)

jim at OSP is having good luck withhis new tcl correction system..

 

[**sj**]

ya one thing I didnt like about the turbo 1100 pc is the oil resi is agnesium...doesnt wick heat out....super heated oil and high AIT's dont help detonation....I had a turbo and manifold blanket on mine..along with straight exhaust..


the more solid mounts have caused the welds on the heat exchanger to leak coolantsince the material there is so thin (heat exchanger)

jim at OSP is having good luck withhis new tcl correction system..

 

[yamyfreak]

That is one thing I notice even with our Vipers and AC 7000, the chain case cover is really hot after we stop at a warm up shack. We check other sleds and they are just warm. Ours are hot. I think placing a hot oil tank for engine to a chain case is a flaw. Just adding heat to the chain case no matter what metal you use.

 

[**sj**]

you are dead nuts on^^^ fyi I came up with an idea of adding a motorcycle oil cooler up in the nose (re plumbing) but then thought what if we had a collision? its definately a design flaw...not to mention some of the guys who blew up gear and chain who destroyed the resi as well...one guy was well underway and sucked shrapnel into the motor and hatched it!

 

[stingray719]

That is one thing I notice even with our Vipers and AC 7000, the chain case cover is really hot after we stop at a warm up shack. We check other sleds and they are just warm. Ours are hot. I think placing a hot oil tank for engine to a chain case is a flaw. Just adding heat to the chain case no matter what metal you use.

Gears and chain should not be harmed or damage the gear oil at temps below 250 F. In my opinion the engineers knew what they were doing with this design in much the manner your transmission cooler on your car is likely siamesed with your radiator.

 

[cannondale27]

Yamaha Owners Manual=1/4 turn
AC Owners manual=1/4 turn
Ac Service manual=1.5 turn

My manual says very light finger tight. Like if you have a baby around let them do it. back off 1/4 turn to 1/2 turn. Remove your belt and turn secondary one full turn checking for a bit of play all the way around. Then go ride and listen for whine like a supercharger. If no noise go ride.