KR-1S.co.uk Forum

As I grovel around under my 1989 KR1 spraying a cocktail of penetrating fluids and solvents into a seized KIPS valve, I have just noticed that the LH and RH exhaust ports and KIPS valves are different. The RH cylinder, the KIPS valves are much more exposed in the exhaust port and the port seems bigger. The LH (the seized one) has small metal bridges either side of the exhaust port that partially obscure the KIPS valves. Has some clown put a KR1S barrel on with a KR1 barrel or are the fumes getting to me?

clowns it will be

Oh.... So do I do the necessary surgery to get back to KR1 or complete the upgrade started by the clown and make top end all KR1s? Are pistons the same for both KR1 and KR1S, or do I have to change these as well.

What a PITA. Can anyone help out with decent stock left hand KR1S barrel with KIPS valves..... or a decent stock right hand KR1 barrel with KIPS valves so I can run a 'matched' engine?

Both barrels are in good shape, so if anyone in the same boat wants to do a barrel swap so we all end up with the right bits, let me know.

Cexley wrote:Are pistons the same for both KR1 and KR1S, or do I have to change these as well.

They are the same.

Charles

Thanks Charles. From reading all round the forum, as my KR1 'appears' to be a stock KR1 in every other way (although who knows what other horrors I will find when I strip it) if I go for a KR1S barrel (a lot easier to find than the KR1) does this meen making other changes? Should I be running KR1-S carbs, spannies, CDI, KIPS linkages/motor etc?

Obviously, I want to take the path of least grief, which would appear to be leaving all else as is and source a stock KR1 barrel so all parts remain compatible. However, if the upgrade to KR1-S doesn't mean changing half the bike, then this may be the easier route due to lack of KR1 barrels out there - unless one of you guys has a right hand KR1 barrel to spare? Craig

Cexley wrote: if I go for a KR1S barrel (a lot easier to find than the KR1) does this meen making other changes? Should I be running KR1-S carbs, spannies, CDI, KIPS linkages/motor etc?

No just get yourself a KR1 or KR1S barrel, you can leave everything else as it is. KR1 barrels are not that popular, might be easier to get one of those.

Charles

Thanks Charles. There are a couple of KR1S barrels on the Bay of Thieves at the moment. One is brand new and says 'DOES NOT FIT KR1'.

http://cgi.ebay.co.uk/KAWASAKI-KR250-C2 ... 19b72606e7

Hope they are wrong.

Do you know where I can get some KR1-S KIPS valves? From what I have read, the KR1 jobbies aren't the same, so will have to change these as well.

Cexley wrote:
Hope they are wrong.

They are. As long as you fit either a pair of KR1 od KR1S everything is fine.

Cexley wrote: Do you know where I can get some KR1-S KIPS valves? From what I have read, the KR1 jobbies aren't the same, so will have to change these as well.

Have you checked the ones currently fitted? If they all have the same size 'hole' in them, you're fine. If not, they're still available from Kawasaki, try Cradley.