Jump to content

421 cub jetting help!


Recommended Posts

  • Replies 36
  • Created
  • Last Reply

Top Posters In This Topic

i just tried a 162 main and it still stumbles before the powerband (high rpm's of each gear) feals much better than the 165, looks like i got some work to do ha

I would drop down your main and and bump up your timing. I am at a 152 main, 3rd clip and 50 pilot +7 timing on a ported cub by HJR. I beat the shit out of the motor last weekend and not a problem and my plugs look good.

Link to comment
Share on other sites

I would drop down your main and and bump up your timing. I am at a 152 main, 3rd clip and 50 pilot +7 timing on a ported cub by HJR. I beat the shit out of the motor last weekend and not a problem and my plugs look good.

 

ya it ran alot better from the 165 to 162 so ill drop it again, i gotta retorque the head tomorrow and check the plugs

Link to comment
Share on other sites

  • 2 months later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

×
×
  • Create New...