tune pipe problem

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Aussie MT Rampage

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I have a new zenoah 4 bolt g290 I have run 2 tanks through it and started and ran faultless


I now installed DDM tuned side pipe and it is now harder to start


Also sometimes the idle increases which makes the truck roll forward and I have to use the brakes to stop it


I sometimes I have to apply the brakes to stop it rolling away and then the motor cuts out but only some times


I have checked the servo and throttle linkages and they all seem fine


Other times it will just sit there and idle perfectly


What causes this and how do I fix it
 
Aussie MT Rampage said:
what is the third bearing mod?
I thought about using a heavier clutch spring to help with the creeping at idle
Click to expand...
OBR/TR makes a sealed clutch housing that allows you to use a 3rd crankcase bearing instead of the sealed bearing. This is it.


From the description on their website : It's a known fact that the sealed third bearings leak and cause an air leak. This housing will allow you to use three open bearings and still have two oil seals. The benefit is you will not need to rebuild the bottom end of your engine as often.


I think the 3rd bearing can just be removed though? This OBR piece would be a good upgrade IMO.
 
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