Comer K80

Mark Moran · Joined: 27 Mar 2009 Posts: 36

Has anyone had any problems with the nikasil coming off after only a few hours? I bought a new one had it blueprinted and ran it for 4 hours 27 minutes and the nikasill was coming off. So after 4 hours I need a new cylinder, piston and a complete rebuild. I bought a new engine so I would not have these problems and still had them anyway. Everyone be cautious buying new K80s.

Doug Fleming · Joined: 04 Dec 2003 Posts: 1995

It happens. A lot less than before. Did someone cut the top off? If not done properly that can start it.
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Doug Fleming
Remember a Diamond is just a piece of coal that did well under pressure
www.flemingmotorsports.com

Greg Welch · Posted: Mon May 21, 2012 10:13 pm Post subject:

We had it happen with a bunch of motors using Silkolene oil. It was spec for our series and cost a lot of people new cylinders.

Curtis Ruth · Joined: 24 Jul 2001 Posts: 656

Do yourself a favor and get out while you can. Get your self a more modern engine that will give you less grief and years of good racing use.

IE
Rotax (Nikasil, but water cooled 21st century technology.
KPV (Cast iron bore with many sizes newer than Comer 80 technology
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Innovative Karting/ Intrepid karts
Glendale, Arizona
WWW.INNOVATIVEKARTING.COM

Doug Fleming · Joined: 04 Dec 2003 Posts: 1995

[quote="Curtis Ruth"]Do yourself a favor and get out while you can. Get your self a more modern engine that will give you less grief and years of good racing use.

And miss some of the best Cadet racing. JMHO Very Happy

$1750.00 brand new blueprinted. Good for 8-10 races. $490.00 total for complete rebuild including all parts, labor and dyno.

Professionally built by the right Person it is no different than and other engine. The all have issues. Name one that doesn't. Rotax won't be on that list. How many KPV 1's do people go thru before They find a "good one".

http://www.mylaps.com/results/showrun.jsp?id=2256424
1st, 2nd, 4th, 10th, all paid $1750.00 for a national caliber engine.

Flame on Very Happy

I always tell people If You don't want a 2 stroke to blow up, don't start it.
_________________
Doug Fleming
Remember a Diamond is just a piece of coal that did well under pressure
www.flemingmotorsports.com

Mark Moran · Joined: 27 Mar 2009 Posts: 36

Doug
That race is the one that it starting going in. I don't know if the top was cut. The shop that built it has several motors that run well in Man Cup. I hope that did it correctly. The cylinder has the nikacil coming off in several spots down low not even close to an edge.

Doug Fleming · Joined: 04 Dec 2003 Posts: 1995

You can send it to US Chrome and they re plate for about $150.00.

I had brand new one a few years ago that was stupid fast on the dyno. At a Stars race I put it on the track in practice on Timmy Bauchman's kart. He pulled out of the pits about 15th. Passed them all in 4 laps, then by lap 8 they all had passed him back. Pulled the head off and it lost about 1 third of the plating.
_________________
Doug Fleming
Remember a Diamond is just a piece of coal that did well under pressure
www.flemingmotorsports.com

Stewart Willis · Joined: 24 Oct 2008 Posts: 367

So, Curtis, I knew you would crowbar the Rotax into this discussion. KPV is too fast in its current configuration for 7-9 year olds to learn on.... What is your suggestion, Micromax? lol Bro, I love you man but we are heading to your shop now to stage an intervention. Obviously you have been drinkin some of your own supply of that Phoenix Koolaid. I am on my way over now!!
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Stewart Willis

Mike DePalma · Joined: 05 Jul 2008 Posts: 43

If a KPV is too fast, go back to kid karts, practice more, or get a baseball glove. Get Ikf to put the Can back on the Yamaha and the problem is solved.

Mark Moran · Joined: 27 Mar 2009 Posts: 36

After contacting Grand Products and Comer about this cylinder I have gotten word that they are going replace it. Thank you

Mark Moran · Joined: 27 Mar 2009 Posts: 36

I got my parts from Grand Products this week and the motor is put back together. We will race tomorrow and see if it is as good as before. Thanks to Grand Products for taking care of this problem.