SOHC.co.uk Forums > CB350/400

Strange jets on 400/4 carbs

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Matt_Harrington:
I do despair sometimes at PO meddling! So the carbs I am refurbishing (with the dodgy pair of pilot jets) I now discover that the main jets are all different - 2x75 (one of which is mullered), 1x100 and 1 unmarked (looks to be pattern one) I can only assume this spare set never ran well and hence were sold off..... rant over..
Matt

Johnny4428:
Jesus Matt! Lucky dip in the main jet box 🤔

Matt_Harrington:

--- Quote from: Johnny4428 on November 02, 2022, 10:02:30 AM ---Jesus Matt! Lucky dip in the main jet box 🤔

--- End quote ---

 ;D I think I'll change that to UNlucky!
Matt

McCabe-Thiele (Ted):
I've PM you I have a set of 75s

Laverda Dave:

--- Quote from: Matt_Harrington on November 02, 2022, 09:41:30 AM ---I do despair sometimes at PO meddling! So the carbs I am refurbishing (with the dodgy pair of pilot jets) I now discover that the main jets are all different - 2x75 (one of which is mullered), 1x100 and 1 unmarked (looks to be pattern one) I can only assume this spare set never ran well and hence were sold off..... rant over..
Matt

--- End quote ---

Sounds like the PO may have tried to fit pod filters or a big bore piston kit and gave up when he couldn't get it to run properly. Why would anyone mess about with carb jets unless they were trying serious engine mods?

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