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size of the holes in the airbox lid?
Topic Started: Apr 6 2012, 09:30 AM (474 Views)
yoshimura
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Knight
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Hi,
i bought a ccm r30 and at the bike was no airbox lid/top-plate, because the seller of the bike lost it in his garage..... . It was not ready to drive with this jetting (main jets 115, twinair filter). I made a plate by my self and changed the main jets up to 135. But with the new kn filter it feels the gas/air mix is to poor.
i think the holes with 35mm are to big, can tell my someone whats the original size of the holes?


cheers
Joe
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Tricky
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Earl
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If you have a race can fitted then 25mm holes should do it.

i lost mine and had to make a dummy one, i put four holes in it and it runs well right through the rev range. It's a little twitchy on tick over but thats about it. Probably running a little rich but better to run rich than too lean.

Edit: Just noticed your perpex jobby. Looks better than mine - i just used a piece of cardboard wrapped in insulation tape. :lol:
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yoshimura
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Knight
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Hi,
thanks for the reply. so my holes are much to big and i try to close two of them with isulationtape :D

regards joe
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Monty
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Charlie Big Banana's
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Original lid has 6 holes, these were opened up to 25mm and worked well will 135 mains and std pilots, plus race can.

area of 25mm hole is 4.9cm X 6 holes = 29.4cm

area of 35mm hole is 9.62cm X4 holes = 38.48cm

So guess to get correct air flow only block of one hole not 2.
If it aint sharp I can play with it
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yoshimura
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Knight
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Oh thanks, i forget there was 6 holes at standard.

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Marc
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Marquess
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Or just get rid of the airbox completely if you like...
CCM 644,Kent cam,Braking wavy disc and 4pot caliper,Brembo radial m/c etc etc

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