I know there is a lot of bikers on here - so thought I'd post this PSA.
On old jap bikes with shim over bucket valves, we have had them break 2-3K after replacement with new.
The common way to spot these seem to be that they have a "-" in their size - not the numner by itself or decimal.
So 2.55 or 255 is likely OK.
2-55 is bad - new chinese shim.
Thanks guys.
Srinath.
On old jap bikes with shim over bucket valves, we have had them break 2-3K after replacement with new.
The common way to spot these seem to be that they have a "-" in their size - not the numner by itself or decimal.
So 2.55 or 255 is likely OK.
2-55 is bad - new chinese shim.
Thanks guys.
Srinath.
Well that's pretty inconvenient. I rebuilt a KZ750 back in the early '80's that used this arrangement, but didn't need any adjustment, as the motor was very low mileage.
jeff
Yea on the gstwin.com site - there is a few guys who've lost the whole motor with shims that shattered and got sucked in the oil and gorund up bearings.
There was one guy who had it break as he was trying to pull it out. A perfect shim - broken.
Cool.
Srinath.
There was one guy who had it break as he was trying to pull it out. A perfect shim - broken.
Cool.
Srinath.
Ahh the old Jaguars style shims It is possible to regrind oversize shims to a lesser dimension. Fairly standard practice when No new shims were available. Works Well too. Careful work involved tho.
I can not understand when some one has an reliable old Japanese motorcycle of why to not order genuine parts?
After market parts always was a gamble.
After market parts always was a gamble.
It depends some aftermarket parts are superior. I replaced the cam chain tensioner on my kawi with a much sturdier aftermarket racing piece that I feel a lot more confidence in once up around 11 thou and beyond rpm. The OEM pieces have been know to slip and kill the top end of an engine.
If it were something made in china it wouldnt of made it near my bike. That could be the problem right there.
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