KawasakiTrax Community

General Category => CLASSIFIEDS: buy, sell or trade here => Topic started by: neworiginal on April 27, 2019, 07:52:03 PM

Title: Wanted 1980 Invader 340 Pistons and Rings
Post by: neworiginal on April 27, 2019, 07:52:03 PM
Looking for a set of NOS 1980 Invader 340 pistons and rings. The aftermarket sets I have bought (SPI,sledpartsguy) on ebay bottom out on the crank and wont allow the crank to roll over. The problem appears to be the skirt tapers. Frustrating a bit.
Title: Re: Wanted 1980 Invader 340 Pistons and Rings
Post by: DougKauer on April 27, 2019, 11:30:54 PM
I have one piston and rings if this will help. PM me.  Doug
Title: Re: Wanted 1980 Invader 340 Pistons and Rings
Post by: neworiginal on April 28, 2019, 09:50:44 AM
Thanks Doug, PM sent.
Title: Re: Wanted 1980 Invader 340 Pistons and Rings
Post by: DougKauer on May 03, 2019, 06:20:24 PM
Brian, sent PM> It's $65 shipped to you.  Doug Kauer  30 Quimby Ave. Woburn MA. 01801
Title: Re: Wanted 1980 Invader 340 Pistons and Rings
Post by: Interceptor398 on May 03, 2019, 09:02:54 PM
Just a reminder that you need to use the link in the email you get when using kawasakitrax messaging or it may not work correctly.
Title: Re: Wanted 1980 Invader 340 Pistons and Rings
Post by: neworiginal on May 10, 2019, 01:32:30 PM
Hi Doug, just want to be sure you got the check and address info. I think something goofy is going on with PM's. Thanks again.
Title: Re: Wanted 1980 Invader 340 Pistons and Rings
Post by: Interceptor398 on May 10, 2019, 09:29:50 PM
Yes!! You cannot just use "your" reply button when using the messaging system here.  You need to use the "link" back to the kawasakitrax messaging for it to work properly.
Title: Re: Wanted 1980 Invader 340 Pistons and Rings
Post by: neworiginal on May 11, 2019, 04:34:46 PM
Understood, thx for the clarification.
Title: Re: Wanted 1980 Invader 340 Pistons and Rings
Post by: Worldawg on October 13, 2019, 01:14:11 PM
Ok so, late reply (we just a snow flurry yesterday so of course I'm back on my snowmobile shit) but I recently rebuilt a 78' 340 invader motor. I used the aftermarket pistons and had the exact same issue that you are having.

I'm about to get A TON of flak for this, I know. But I went ahead and put the motor together. I set it up on my bench and put the pull cord on and just brute forced it past. After the first time, It got considerably easier (I don't even want to speculate why...).

I finished putting it together and it started up. I actually was able to run it most of the winter too. It had a radiator leak that sort of screwed me out of much of my riding it, but it other wise seems to be fine. I've started it twice this summer and done some grass rips with it too. In the near future I'm going to fire it up again.

Look, I know how stupid that was. I really do. Do not ask me why I did it, and don't ask me why its working but it is. Motor still has great compression (145-150 both sides), turns over real nice w/ pull cord and runs strong (other than a carb tuning bog I still have to get worked out bc I'm a tuning scrub).

Video of first startup (smoke is because I waaaay over did the initial oil dose, plus had the oil pump geared up, plus had oil&gas mix in for the intitial break in)

https://www.instagram.com/p/BsOVdamA9HC/
Title: Re: Wanted 1980 Invader 340 Pistons and Rings
Post by: Checkmarks on November 24, 2019, 11:20:56 PM
The flack

When installing new pistons you must measure the end gap of the rings!  Feeler gauge $10 at harbor freight.  Two minutes to put the ring in the hole squared with the piston and measure.  Better be at least 3mm or likely you are going to cold seize and jack up your cylinders.

Or just send it as a good friend might say while I roll my eyes and tell him "not with my motor!".