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Post by jimblob on May 16, 2022 18:27:57 GMT 1
Hi guys,
I’m rebuilding the engine to my rd350r (1995).
Is it ok to reuse the gudgeon pins as long as there is no obvious wear/damage to them.
I’ve also had the barrels honed and got new piston rings so I’m presuming the old pistons would be fine to use.
Cheers in advance
Jim
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Post by zed1015 on May 16, 2022 18:50:44 GMT 1
Yes! and Yes! as long as bore clearances etc remain in spec.
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Post by jimblob on May 16, 2022 19:06:32 GMT 1
Cheers zed1015
I had a sudden panic that gudgeon pins had to be replaced and then if I was replacing the gudgeon pin I may as well buy a piston kit and if I’m buying a piston kit I may as well……..etc. 😳
👍
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Post by midlifecrisisrd on May 16, 2022 19:51:58 GMT 1
If you have had them out then fit new genuine Circlips
Steve
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Post by rigga on May 16, 2022 21:57:22 GMT 1
If you have had them out then fit new genuine Circlips Steve Very much this, once disturbed, no guarantee they will stay in place, cheap insurance against bore damage. |
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Post by freddie19 on May 17, 2022 4:38:22 GMT 1
I've just replaced the gudgeon pins on my 7000 mile RZ350 engine after a strip down due to the rings gumming up causing no compression.
Couldn't budge the rings on one piston so I've replaced them both with new genuine Yamaha std pistons and rings.
Lightly honed the cylinders and fitted new genuine Yamaha small end bearings and gudgeon pins as mentioned earlier.
Total overkill on my part as the gudgeon pins showed very little wear along with the original pistons which looked as new apart from the carbon.
But hey, I thought while I'm in there and got it all apart I might as well do the lot, and do it right once and for all.
Hopefully never gonna have to strip down the motor again because I ain't getting any younger and the low miles I do nowadays!😁
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Post by chrisg on May 17, 2022 11:26:07 GMT 1
Hi guys, I’m rebuilding the engine to my rd350r (1995). Is it ok to reuse the gudgeon pins as long as there is no obvious wear/damage to them. I’ve also had the barrels honed and got new piston rings so I’m presuming the old pistons would be fine to use. Cheers in advance Jim The existing pistons are ok to use, if there within spec. and not gummed up or scorred. While its stripped, maybe get the cylider/piston skirt clearance checked. |
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Post by jimblob on May 17, 2022 16:33:16 GMT 1
Cheers for the advice guys,
Yep, I’ve got new circlips waiting in my box of bits.
👍
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Post by bare on May 18, 2022 18:09:30 GMT 1
Curious as to How? after 7k miles the Rings were So Effed up?
Certainly reads as a Major cause /issue IMO.
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Post by chrisg on May 18, 2022 21:21:19 GMT 1
Curious as to How? after 7k miles the Rings were So Effed up? Certainly reads as a Major cause /issue IMO. Poor lubrication and or carburation? Maybe a bit more i vestigation needed. |
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