5000 revs

kr1chris · Post by **kr1chris** » Mon Aug 21, 2006 5:48 pm

Ok so in goes my freshly rebuilt (well, top anyway) engine into my never engine project bike, go out for a ride- and on the road won't rev past 5/ 5and a half thousand. Doubt the bike is producing more than 10-15 brake max as it is. Just spent 400 notes on the engine so should be no troubles there, carbs are clean- so elecs? After the ride I put down the side stand and engine cuts out, even though my hand is off the clutch.

I remember someone saying something about this topic on the old forum- but obviously can't find that now so any ideas!?

Cheers!!

Garry · Post by **Garry** » Mon Aug 21, 2006 8:14 pm

think someone had this problem and it turmed out to be CDI
is bike running on both cylinders? KIPS valves set up right?

rockerted · Post by **rockerted** » Mon Aug 21, 2006 10:20 pm

mine always cuts out when u put s/stand down, its supposed too i believe, although i can start it if its plenty of fuel in with s/stand down..ted

the-elf · Post by **the-elf** » Tue Aug 22, 2006 1:35 pm

I had the same problem but it wouldn't rev past 8k. Is your rev counter needle bouncing around? If it is then the pick up coil is knacked. If not I would check the resistances on the stator. If that fails then swap the CDI unit over with a known working one and see if that cures it.

JanBros · Post by **JanBros** » Tue Aug 22, 2006 2:51 pm

probably the stator.

it's a known problem. usualy if that's the problem you get no more sparks, but sometimes they still work at lower rev's.

kr1chris · Post by **kr1chris** » Tue Aug 22, 2006 8:08 pm

Cheers for all the feedback. Time to dig out the spare bottom end and do some swapping over. Will post whatever the problem is! Kips valves are ok, and move fine etc on ignition, rev needle bounces about when side stand goes down but not while moving. Lets wiat and see...

the-elf · Post by **the-elf** » Fri Aug 25, 2006 12:59 pm

kr1chris wrote: rev needle bounces about when side stand goes down but not while moving. Lets wiat and see...

that sounds like it could be the diode under the tank. Grap your self a copy of the manual and a multimeter and best of luck. Finding the fault on mine was a sod as it was only failing under load for the first month or so until it packed in totally. Once that happened it was easy to find what was causing it

kr1chris · Post by **kr1chris** » Wed Aug 30, 2006 7:30 pm

Yes, I know, this is a cop out.... but.

I spent a couple more eves tinkering with it (yes the bike), with no luck- also a lot of my spares cannot really be described as 'known good' rather than 'likely shit'- which is why they are collecting dust and/or small animals in search of a new home.

So, I took the bike to a dyno, and pulled out the credit card.
Problem was- combination of dodgy wiring around base of engine and flywheel, and previous owner's (in loosest sense of the word) maverick jetting.
Journey home was substancially more fun than journey there....

Totally std bike (kr1), not yet run in properly- 45.3 bhp. Does this sound ok, i.e as opposed to pub figures this is actually the exact figure- or anything else that might help? Power questions, definitely more fun than wiring questions! Still stutters abit around 5/ 6 but has never been on a run as it is so hoping this might improve , optomistic maybe but fingers crossed...!

the-elf · Post by **the-elf** » Thu Aug 31, 2006 1:12 pm

That power figure sounds about right for a standard KR1. If you want to get another 5BHP fit some KR1S exhausts and jetting.

rockerted · Post by **rockerted** » Thu Aug 31, 2006 4:14 pm

aqccording to 89 manual, 40.5 kw or (55ps) @ 10 500 rpm

cheers ted i hope this helps ( if it,s going ok ride it!!)

kr1chris · Post by **kr1chris** » Thu Aug 31, 2006 8:41 pm

Cheers guys will give the lad at least a bit of a chance first, few more hundred miles, and then see....!