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Post by ypvs400 on Jun 23, 2018 8:10:40 GMT 1
A good if not better option to swapping you perfectly good Mikuni carbs for any other brand is to bore out the VM 26, these can safely go out to 28mm and give a smooth bore carb as a result. This is straight forward to do if you have a lathe and has gone on for years in two stroke racing plus you get to keep the original look of the bike. I have done this numerous times with good results.
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Post by bazzer5115 on Jun 23, 2018 8:37:56 GMT 1
A lot of these carbs are worn out by now?
If you got a good set,not a bad idea.
But they still round slides so don’t benefit from flat slide advantages.
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Post by earthman on Jun 23, 2018 8:45:31 GMT 1
A good if not better option to swapping you perfectly good Mikuni carbs for any other brand is to bore out the VM 26, these can safely go out to 28mm and give a smooth bore carb as a result. This is straight forward to do if you have a lathe and has gone on for years in two stroke racing plus you get to keep the original look of the bike. I have done this numerous times with good results. Next time you do it, can you post some pictures of your set up? I'd like to see how you hold the carb in the lathe etc. |
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Post by jon on Jun 25, 2018 19:52:15 GMT 1
I don’t think the VM26 can be bored to 30mm.
Aren’t they 28mm slides from memory?
I think the earlier 28mm carbs were 30mm slides, so I’d possibly bore to 29mm.
Jon
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Post by bare on Jun 27, 2018 21:56:04 GMT 1
Boring Carbs for a wee Size increase ...without incurring the Cost of a Larger Carb.. OLD idea tho.
I did a few in 1967 Barely worth the candle though. Haven't ever thought of doing it again :-)
One risks messing up both the side of Slide sealing AND the bottom of the bore jetting interface.
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Post by ozzysbikes on Jul 2, 2018 23:59:09 GMT 1
I heard (after I finished of course !) that the LC proddy bikes were doing this trick, illegally of course ! only after the event do you find out that everyone cheats ! (not bitter or owt)
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