after reading some of the comments on my latest blog, i have noticed a certain disliking of strike pistons by a few of our members... this isnt the first i've herd of this, and im a little curious as to what the fuss is.
is there any gain in going to another piston? is it just reliability issues, or cost, or whatever?
and then, what is the piston i should be running?
thanks for the help... Andy
is there any gain in going to another piston? is it just reliability issues, or cost, or whatever?
and then, what is the piston i should be running?
thanks for the help... Andy
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Comments7
Andy, there was a "bad" batch of these pistons going around, however lately they have been good and my builder preferred them over any other piston.
My engine builder says that he finds they let the engine rev more but dont last as long. Run what your engine builder prefers and has experience with.
Andy
A lot of builders recommend strike as they are manufactured to order for smaller bore size increments and odd sizes.
Yer there was a dodgy batch that even had a "different "appearance to your'e usual strike piston that was sorted out early in the year/ late last year though ( unless your'e engine builder has some still in stock.).=O
Strike are good pistons.
Funny bout the revving bit as i've actually done a weight measure on strike compared to genuine Yamaha and the Yammie piston was lighter.??.........so go figure.
The gudgeon to crown measurement and ring land is different on the strike to the yammie piston ( from what I have seen anyway).So doing barrelheight vs port heights/timing vs piston position may make the strike better from a builders point of view.dunno.
But I am probably wrong.......best thing to do is ask a well known engine builder and then you probably won't get an answer from someone like me whos just guessing anyway . lol.
BTW who is your'e engine builder????ATM
James True said:The gudgeon to crown measurement and ring land is different on the strike to the yammie piston ( from what I have seen anyway).So doing barrelheight vs port heights/timing vs piston position may make the strike better from a builders point of view.dunno
That just means you need different base gasket thickness to get the same exhaust port timing
Ernie
I Just use one of the local guys up at newcastle. He doesnt do it for a living so he is relativly cheap but still does a good job. I think he said it is the shape of them that helps them rev but i dont remember. ill tell you the results when i get my engine done next.
We had a strike piston completely shatter the skirt in a clubby engine earlier this year. Compared to the KSI the skirt of the strike is a lot thinner, and not braced as much. James as you said the Strike is heavier than the Yamaha piston, up until now i always thought it must have been a recipricating mass situation.
haha i think i was the one that initially made the comment. This is mainly due to the fact that i had 3 shatter in a matter of 1 month. There was nothing unordinary wrong with the engine. No overheating etc. just faulty pistons. It ended up destroying my barrel that badly that it couldnt be rebored. So I ended up losing quite a fast engine