142 engine feels like it's going slow

Rusoap

New Member
Joined
Jan 13, 2017
Messages
3
I'm new to building motorbicycles and had my 142hs for a few months now, ever since I got it to run it feels like it's going pretty slow. It will usually not go above 20 and at top speed it bucks slightly and the acceleration doesn't sound right. Is there anything I can do to fix this?
 

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Cozmik Mezzenger

Active Member
Joined
Jun 20, 2015
Messages
279
I'm new to building motorbicycles and had my 142hs for a few months now, ever since I got it to run it feels like it's going pretty slow. It will usually not go above 20 and at top speed it bucks slightly and the acceleration doesn't sound right. Is there anything I can do to fix this?
It could be a number of things. What have you checked?
 

lee

New Member
Joined
Sep 25, 2016
Messages
22
I would check the valve settings & install a NGK Iridium plug 7544 CR7HIX.
 
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