Pacific Park

Had fun,...sort of... the last few weeks. My son bought himself an oldish YZ80, seen here after he painted  it up...

vid of Dyls falling off...

Been taking it out to Pacific Park at Maroota (NW Sydney) where there's 100 acres dedicated to caravanning on the river, and trail riding and motocross.

Its quite a neat place, if it wasn't for all the noisy bloody bikes!

 

First week went without any dramas, and the bike went ok...

 

Next week was a different story.....he rode for about an hour, then it stopped... we stuffed around for ages trying to restart it, then finally realized it'd lost compression.

Took it home and pulled it to bits, and there wasn't anything obviously wrong, but the sole ring on the piston was getting pretty thin...

 

The bore and piston clearance didn't look too bad, so we just ordered another ring and a gasket set.

when Id pulled the piston off the con rod, Id lost a circlip, the spring wire type... that sprang into the bushes, so I replaced it with one from a tool place...

So up we come again the next week, after it'd been running ok round the house for an hour or so...

20 minutes later same damn thing...no compression. Hmm its 50kms each way, and $25 to get in...this is getting silly for 1/2 hr of riding!

Pull it to bits again...and the new circlip which was a different type (silly me) has broken, got sucked up into the combustion chamber, and hit the edge of the piston

and squashed down on the new ring so it aint sealing any more...First thought is its stuffed, rebore and new piston needed, so order the piston.

Have another look, and we carefully remove the ring, and straighten out the groove, and I reckon she'll go again...at least for a while whilst we wait for the parts to come in...

So next morning, back together she goes, and it fires up eventually. runs for 20 minutes again, then no compression yet again. Bloody things jinxed..!

I give up for the day, and say we'll pull it to bits tomorrow, and 'ave a look...

Dyls gets up at 6 and pulls it to bits himself, probably easier on his ears, me not being there cursing thru the whole operation again, and finds something surprising.!

Some twat has put the old original ring back in......Ill never admit it was me, so he's to blame. However he substituted the old for the new, reassembled, and its going again, so yesterday  arvo, out we went again...Going ok now...

 

 

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