Carb Rejetting

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Jan 31, 2026 | 05:20 PM

#21

hammer6315

HDF Community Team

Joined: Jan 2010

Posts: 1,244

Likes: 453

From: shore of Gitche Gumee

Quote:

Originally Posted by John Harper

I'd suggest changing your intake manifold seals, ditch the Dynojet kit, go with a 170/45 main/pilot combo and 2.5 out on the idle mixture screw. Maybe buy a CVP Velocity needle or just leave the stock one in place. Check your plug color and use the "idle drop method" to fine tune your idle mix screw. A 1200 should be able to take a 170-175-180 main jet.

John

Years ago when my new '91 1200 was not performing properly. The dealer cured it when they discovered a 'burr' on one the carb jets.

Jan 31, 2026 | 05:56 PM

#22

John Harper

HDF Community Team

Joined: Dec 2011

Posts: 8,424

Likes: 3,792

From: San Diego, CA

Quote:

Originally Posted by hammer6315

Years ago when my new '91 1200 was not performing properly. The dealer cured it when they discovered a 'burr' on one the carb jets.

Wow, that's doing some really good diagnosis. I've found that clogged pilot jets cause more problems than any other issue, especially if a bike has sat for any extended time.

John