golfaddicted
Veteran
Just installed it and put in 3 stock head gaskets. fired it up and it won't even come close to an idle. If I hold the throttle open part way, I can get it to idle but tried the idle screw and the black knob on the end of the IAC with not much change at all. The pure logic box is set on 1 at idle and 2 at midrange. It will rev up, but it takes some playing with the throttle to get it to do so. I haven't tried to ride it yet. What next? Could the cam timing be off? I made marks and checked and double checked before putting it back together.
efiguy
Veteran
- Joined
- Feb 11, 2005
- Messages
- 33
I'm sure others will chime in, but it's very likely your cam timing is off or a shim dropped inside the shim-bucket (measure each valve for proper clearance) - DON'T RUN THE SLED until you get it fixed or you WILL DAMAGE THE ENGINE! (like end up with bent valves or worse). Also, the extra thickness of the head shims will cause the cam timing to be advanced a little, which is ok for the exhaust, but you may want to retard the intake back to the stock marks (you can file on the bolt holes a little to rotate it slightly).
TurboJamie
TY 4 Stroke God
It will idle fine with stock cam timing and 3 stacked gaskets I know this becase mine does.
- Joined
- Jun 28, 2004
- Messages
- 2,436
- Age
- 64
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- Clinton, Wi.
- Country
- USA
- Snowmobile
- '11 Apex XTX, '09 Venture GT, '06 Attak, 08 Nytro Hybrid
Try this link for some possible causes http://www.ty4stroke.com/viewtopic.php?t=54395
snowy1
TY 4 Stroke Guru
could be a vacumn leak some where.
golfaddicted
Veteran
I think the chain jumped a tooth
Does someone have any pictures of the camshaft sprockets at TDC or an easy way to tell if it is off?
I have the valve cover off and the motor at TDC right now. I would post a picture, but the motor is still in the sled.
THanks
Does someone have any pictures of the camshaft sprockets at TDC or an easy way to tell if it is off?
I have the valve cover off and the motor at TDC right now. I would post a picture, but the motor is still in the sled.
THanks
TURBLUE
TY 4 Stroke Junkie
- Joined
- Nov 1, 2005
- Messages
- 620
- Age
- 49
- Location
- Southern Alberta
- Country
- Canada
- Snowmobile
- Sidewinder MTX
have you pressure tested?
powderlites
Expert
Cam timing
Should have stock hole on intake at 11:30 and 12:30 on exhaust.
Email me and I can send info to you.
http://www.powderlites.com
Should have stock hole on intake at 11:30 and 12:30 on exhaust.
Email me and I can send info to you.
http://www.powderlites.com
golfaddicted
Veteran
Thanks for the replys
I got it figured out. Thanks to lakercr. The timing was off. I'm going to go get some spark plugs and more coolant and then I'll fire it up again. I expect much better results this time.
I got it figured out. Thanks to lakercr. The timing was off. I'm going to go get some spark plugs and more coolant and then I'll fire it up again. I expect much better results this time.
