KR-1S.co.uk Forum

Hi There,

Which way does the arrow point to, as I rebuilding my engine???

Thanks

It should point to the front of the bike.

Thanks!!

the arrow on 2-stroke-piston's always points to the exhaust

OK I have seen the arrows before, but I dont have one on my new Mitaka piston, Help!!!

usafric wrote:OK I have seen the arrows before, but I dont have one on my new Mitaka piston, Help!!!

Looking at a standard piston there are four drilled holes in the piston body, these are to allow for lubrication, (so i have read) these holes are on the forward side of the piston, in other words they are on the side that faces the exhaust port.

Ta for the quick reply...

usafric wrote:OK I have seen the arrows before, but I dont have one on my new Mitaka piston, Help!!!

the most important thing with fitting 2-stroke piston's, is the pin that holds the rings

when the piston goes up and down, there must always be metal. if the pin passes a port, the rings will pop out into the port and ruine a perfectly good cylinder

normaly, piston's are installed with the pin facing the "rearer" side of the cylinder.

so check where the pin would be when you fit the piston in both positions, and install it the way that most metal is arround the pin area

jonny1deck wrote:Which way does the arrow point to, as I rebuilding my engine???

the-elf wrote:It should point to the front of the bike.

JanBros wrote:the arrow on 2-stroke-piston's always points to the exhaust

S'not always the same thing ! My KR tandem-twin had a top-end rebuild by the Kawasaki-trained mechanic who owned it before me, and he put 'em both in pointing forwards....

And don't get me started on my TZR Reverse-Cylinder...

StrokerBoy wrote:S'not always the same thing ! My KR tandem-twin had a top-end rebuild by the Kawasaki-trained mechanic who owned it before me, and he put 'em both in pointing forwards....

I'd be very surprised if that's the right way

maybe you should check this with your connections in Japan

JanBros wrote:

StrokerBoy wrote:S'not always the same thing ! My KR tandem-twin had a top-end rebuild by the Kawasaki-trained mechanic who owned it before me, and he put 'em both in pointing forwards....

I'd be very surprised if that's the right way

maybe you should check this with your connections in Japan

I just had a look on your own website, found the parts list, and guess what : check the arrows......



so, in the future, ALWAYS put the arrows towards the exhausts


and before I forget : give your Kawasaki-trained mechanic some descent spanking

Gasket set on order?