KR-1S.co.uk Forum

martin wrote:2t fine. i have just ordered a new coil from wemoto. maybe its a intermitant spark and hard to notice,

Never noticed that they had new coils before. I know original one's are NLA.

wakasaki wrote:Elf wrote: Check the rubbers, reeds, reed cases and gaskets. The other posiability is that the crankcases are not sealed together fully and you have a leak between the two halves on one side.

Ermmm no....
otherwise it would be apparent for weak..running...
"not that iam complaining.....but a trifle OTT"

I did say

the-elf wrote: cylinder to run a tad weak compared to the other.

, might only be a tad weak from a slight air leak but its worth looking into if the new coil dosn't solve the problem. As standard the bike is set up on the rich side, so that its pretty safe requardless of air temp, pressure etc.

Small air leaks can turn into a very big air leak very quickly

deffo no air leaks on the reed blocks or carb rubbers, but still smokes more on left side, gonna take it out tomorrow and give it a good thrashing not sure how to copy a link from wemoto website, but if you click on to ht coils, then scroll down, there is one, twin lead cdi coil[90mm hole spacing]22nd one down £29.38 [there is a picture] it fits exactly and to look at,is identical to the origanal

Is there a big difference between the amount of smoke?

The LHS is the most prone to failure (from my experience) as the crank case is thinner and allows more flex (RHS has gearbox behind it which stiffens it up). So if the LHS is OK then unless some gasket glue is missing the RHS case should be as well. Only real way to check it that I can think off is to get it on a dyno and check the Oxygen levels in each exhaust as its run up to speed.

Thanks for the tip on the coil I'll get one ordered when I next get paid. Mine is running with a couple of new HT leads siliconed in the end as the originals leads gave up ages ago on all four original coils that I have kicking about.

if the left is smoking more than right it maybe just were fuel/oil has sat in the cases as the bikes been parked, presumably on a sidestand? with the carbs perfect i cant see this happening but ive known this happen on strokers loads of times. nowt to really worry about, in fact its quite normal. id go for a 20 mile thrash and then check. i wouldnt be suprised to hear that there both burning evenly post ride.

all smoke cleared went out for a long ride today, gave it a good f--king thrashing, with the new coil, no more weak spark

martin wrote:all smoke cleared went out for a long ride today, gave it a good f--king thrashing, with the new coil, no more weak spark

Great to hear that it's sorted.

Just ordered a new HT coil They are a bargain at that price. Could someone add the details to the KRchieve section for future reference as the original Kwak one's are NLA.

Now in the electrical part of the KR-Kive HERE Can someone check I have linked to the correct one!
Cheers
AL

yep, thats the one. i fitted one to my kr. cut the leads down as a bit long. no more weak sparks

martin wrote:yep, thats the one. i fitted one to my kr. cut the leads down as a bit long. no more weak sparks

Got to say you don't really notice now poor an 18 year old coil is until you swap it for a new one. Its a hell of an improvement and great value for money.