appropo last weekend post (nasty noises from No1 srx) go to the top of the class all those who reckoned it could be piston slap.
Well, it is, sort of.
Just spent a happy couple of hours stripping off, first the rocker cover (everything looked perfect there), then the head, at first glance looked ok, but what's this?
an unhealthily large gap between piston and liner front to back, can clearly see the top ring ! probably a 50 thou + gap!, eased off the barrel, and...oh bluddy dear...
this is now the 3rd time this engine has 'picked up' at the rear of the piston (a not uncommon srx problem, normally associated with poor oil pump performance , or not changing the oil/filter. Now I, if anything, over service this machine, changing the filter with every oil change, and changing the oil VERY regularly, AND, a new oil pump was fitted after the last occurrence ! ) BUT, last time this happened, the bore was honed and appeared to clean up ok, AND i'm running a high compression wiseco piston, with short skirt.
Seeing the state of it, I'm amazed at the compression it still had.
So.....I think this time I'm either going to replace the barrel/liner, or go for a larger liner , say 620cc (denver motorcycles can open out the barrel and press in the larger liner for me, and a new (obviously) piston, maybe high compression, not sure. I wonder if it's worth removing the oil pump to see if it's scored or the seals are sha55ed (it's only done about 18k kilometers), anyway........something to keep me occupied for a few evenings.......anyone got any spares for sale?
?
pip pip