Author Topic: C15 rebuild  (Read 305 times)

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TIGER

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C15 rebuild
« on: 08 June, 2017, 11:42:14 »
As some of you know I have just finished a rebuild.
Just noticed the carb. Is 375/4
Engine is coded SS80
Information from Julian stated should be 376
Can I achieve reasonable running with the 375 or not
Not interested in top performance just a reliable run about.
Any advise much appreciated as usual
Regards
           Tim

JulianS

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Re: C15 rebuild
« Reply #1 on: 08 June, 2017, 12:25:31 »
The 375/4 was originally fitted to the C11G and C12 250cc bikes 1955-1958.

The bore is 25/32 inch and, if your SS80 is home market not USA type then the 376 originally fitted would have been 1 inch bore (1 1/16 if US market). That is quite a step down in bore size. (The standard C15 had a 7/8 inch bore carb)

Your bike will probably go OK but not as well as it would with the right size carb and you may need to experiment with different jets and slide for best running.

TIGER

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Re: C15 rebuild
« Reply #2 on: 08 June, 2017, 12:35:12 »
Many thanks Julian.
I have found 200 and 240 recommended for the 376
I will experiment with these with my carb. first
Regards
           Tim