Bike shuts off after ripping threw gears

[crazy4life]

Just finally finished putting back together my rm 85. Its running real good but the only problem is after ripping threw the gears and letting off the throttle and pulling in the clutch it likes to die. Resulting in me having to drop the clutch to get it started again.

I dont have the manual so i just torqued the head bolts at 40 ft pounds and did a star pattern on the cylinder bolts sence i dont have the proper tool to torque thous bolts..

 

[_JOE_]

How does it idle at a stand still?

 

[dirt bike dave]

40 lb ft sounds like way too much for head and cylinder bolts on a small two stroke. I think 14 is more in the ball park.

As for the stalling, I've got no idea.

 

[crazy4life]

It does not idle very well but it has great compression. And i will be sure to torque the bolts wayy less!!!

 

[Cabot]

They say that torqueing bolts is only to prevent overtightening/stripping threads. Not sure how much of that is true, but I don't think thats your problem.

If it doesn't idle very good just sitting, its not going to idle any better while you are moving. Fix how it idles at a stand still, and this should fix your problem.

 

[Patman]

I would venture it's more related to the intake tract (airbox/carb/reeds) than it is to head bolts.

 

[RM85rider123]

40 lb ft sounds like way too much for head and cylinder bolts on a small two stroke. I think 14 is more in the ball park.

As for the stalling, I've got no idea.

14 pounds is a little off. they should be 20 foot pounds, that's what my manual for my RM said :cool:

 

[Patman]

Still alot closer than 40 LOL!

 

[_JOE_]

Not sure but I would be reluctant to loosen the head bolts. I would think there is a possibility the gaskets sealing may be compromised from being squished down then loosened. Like I said I'm not sure if that would happen though. I'm with Pat on the intake system. Have you tried turning the idle up?

 

[RM85rider123]

Still alot closer than 40 LOL!

most definitely :ohmy: I am surprised that he did not mess up the head.

 

[flyingfuzzball]

he might have just not having felt the affects yet.

heck my friends yz80 was running that seat cushion stuff you find in car seats for an air filter. he said it was running fine. that is until now....or the last 3 months.

 

[crazy4life]

I dont like to hear that i might have problems when i loosen the head bolts!!!

 

[_JOE_]

Just an unfounded theory that ran across my mind. May not be an issue. What does it run for head gaskets? O-rings or an actual gasket?

 

[sixds]

most definitely :ohmy: I am surprised that he did not mess up the head.

he's lucky his studs didn't snap, but i bet they are stretched out a bit and are way more brittle so i'm guessing the next time he torques them they will snap.

 

[crazy4life]

!!!!!!!!!!!! And im pritty sure its just an o ring, it was like 10 bucks on ebay for the whole top end gasket set

Any more things that could go bad when i un torque my bolts tommorw.. :bang: :bang: :bang:

 

[sixds]

i would just buy new studs, i'm guessing they will snap anyway.

 

[Patman]

Buy the parts and sit them on a shelf and replace them next time you do a top end, otherwise just leave it alone for now and sort out the running issue.

 

[CarnageZ28]

Their all being paranoid. Its not going to snap a case hardened steel stud from TQ'ing it to 40 foot lbs.

Like Patman said, just replace the studs NEXT time you do a top end. And as long as you Tq'ed them all evenly, I dont think you have to worry one bit about them being 40 pounds. Dont loosen them inless you are prepared to replace the gasket. IMHO though, the studs should be fine.

It almost sounds like it isnt filling the float bowl up fast enough. If you keep it pegged running through the gears, what does it do? Will it start to stutter after a while?

Maybe your float height is missadjusted ...