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Stick with the 100cc National
Posted by 'DavyBoy' on 30 Sep 2008 @ 21:19


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DavyBoy
Joined: July 2005
Total Posts: 1
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... if all you want to do is have some fun. If its been rebuilt, do as Ian says and keep the revs down to about 16,000 [easy... just use a smaller size rear sprocket] and you'll have happy, cheap karting.

These are truely awesome pieces of kit. They're simple, immensely powerful and sound fantastic.

There are a couple of possible problems here :

o The needle valve/seat in your tillotson carb may have worn. This means that your jet adjustments aren't having the desired effect. A new needle valve assembly is very cheap.

o There's dirt in the carb... a similar effect to above. Take the carb to pieces and clean it with clean petrol [no oil mix] or carb cleaner and make sure its SURGICALLY CLEAN... [something smaller than a human hair will foul it].

o The oil seals in the motor have worn out. These are cheap to buy [a couple of quid] but as 100cc motors go, a little awkward to fix. If the motor was dying as the revs were starting to build... and then picking up as the revs dropped... that's a signal there.

There are plenty of us old fogies with knowledge of these things and few people to advise...

Message Thread:

100 National problems  by 'mycool'   (30 Sep 2008 @ 10:53)
Re: 100 National problems  by 'itpro'   (30 Sep 2008 @ 11:37)
Re: 100 National problems  by 'mycool'   (30 Sep 2008 @ 13:35)
Re: 100 National problems  by 'NJB'   (30 Sep 2008 @ 13:45)
Re: 100 National and other engine options  by 'mycool'   (30 Sep 2008 @ 15:51)
Re: 100 National and other engine options  by 'buzzinrussell'   (30 Sep 2008 @ 15:53)
Re: 100 National and other engine options  by 'itpro'   (30 Sep 2008 @ 16:29)
Re: 100 National and other engine options  by 'mycool'   (30 Sep 2008 @ 16:43)
Re: 100 National and other engine options  by 'mycool'   (30 Sep 2008 @ 16:45)
Re: 100 National and other engine options  by 'Attack2001'   (30 Sep 2008 @ 16:54)
Re: 100 National problems  by 'QuickOldTimer'   (30 Sep 2008 @ 20:10)
Stick with the 100cc National  by 'DavyBoy'  << You are here!
Re: Stick with the 100cc National  by 'mycool'   (01 Oct 2008 @ 10:01)
Re: Stick with the 100cc National  by 'DavyBoy'   (01 Oct 2008 @ 17:48)
Re: Stick with the 100cc National  by 'mycool'   (02 Oct 2008 @ 17:30)
Re: Stick with the 100cc National  by 'DavyBoy'   (02 Oct 2008 @ 17:57)
Re: Stick with the 100cc National  by 'mycool'   (03 Oct 2008 @ 9:48)
Re: Stick with the 100cc National  by 'DavyBoy'   (03 Oct 2008 @ 10:06)
Re: Keep it simple  by 'bertie77'   (03 Oct 2008 @ 11:07)

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