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RE: cdi
Posted by : Nut and Cheri - Cheltenham (82.33.210.228) 
Inappropriate or SPAM?
On Monday 01/07/13 at 17:51:58
Hi James
Don’t be put off by the flat earth society (no offence chaps 
), Burt Munro wasn’t and neither am I, lol. However they do have a point, trying to improve on the original set-up is no small feat as these bikes in standard form with the tappets set correctly go bloomin well. A couple of standard ones just did well in excess of 1000 miles in 24 hrs, and when Newt on his standard Cub90 and myself on my modified one did John O Groats to Lands End in 24 hours: Newts was still running perfectly at the end, and mine melted its piston 
. But if you enjoy tinkering, then don’t let any of that put you off, it hasn’t put me off and I no longer melt pistons 
The bad news is that in my experience; no so single component will provide an improvement in performance, especially the CDI. The CDI on a Cub 90 does nothing more exciting than move the timing from the trailing edge of the blob on your flywheel at low revs to the leading edge of the blob at high revs. Performance CDI’s offered for Cub90’s and pit bikes with AC ignition systems do absolutely bog all, and don’t believe any rubbish about the std CDI having a rev limiter either. I’m afraid the road to gaining more performance from a Cub90 engine is a long and expensive one, this is why a lot of riders are now either leaving them standard or simply swapping the entire engine for Lifan 110 which provides a 4 speed box and a little more grunt up the hills.
All the best and happy tinkering.
Neil
Message Thread:- cdi - james Mon 01/07/13 at 03:25:27
- RE: cdi - Kebob Mon 01/07/13 at 05:29:18
- RE: cdi - Fuzz, North west Bulgaria Mon 01/07/13 at 10:55:14
- RE: cdi - nige Mon 01/07/13 at 17:34:22
- RE: cdi - Nut and Cheri - Cheltenham Mon 01/07/13 at 17:51:58
- RE: cdi - Bogger Mon 01/07/13 at 17:58:34
- RE: cdi - Harry Notts Mon 01/07/13 at 19:47:53
- RE: cdi - Nut and Cheri - Cheltenham Tue 02/07/13 at 00:18:26
- RE: cdi - Harry Notts Wed 03/07/13 at 03:01:46
- RE: cdi - james/Dorset Mon 01/07/13 at 21:09:46
- RE: cdi - Diesel - Brentwood Mon 01/07/13 at 22:06:50
- RE: cdi - Nut and Cheri - Cheltenham Tue 02/07/13 at 00:26:12
- RE: cdi - Diesel - Brentwood Tue 02/07/13 at 00:52:55
- Melted piston... - Newt Wed 03/07/13 at 03:58:27
- RE: cdi - radar shropshire Tue 02/07/13 at 01:30:56
- RE: cdi - Fuzz, North west Bulgaria Tue 02/07/13 at 23:54:46
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