Question about an older COMER 2 cycle engine

[dinot71]

I am new to carting and I may be picking up a cart tomorrow with an older (8-10 years old) COMER 100cc engine. Can someone tell me if these are good and/or reliable engines? Does age degrade them at all? Can they be started with a quality high power drill? Here's a few closeups of the engine.

 

[Russ2251]

Yes ...they are good. However, they do require rebuild every 100 hours or so because of the strains they are under. It is a professional racing engine and not designed for the kind of backyard stuff that most of us do.
If the price is right...by all means get it. I would.

 

[dinot71]

Is a rebuild hard to do and expensive? Do you what parts need to be replaced?

 

[Bluethunder3320]

when i rebuild engines i just clean up the original parts usually.

but for racing this probably means cyl. hone, new piston, rings, rod, valves, seals, etc.

 

[fowler]

Is a rebuild hard to do and expensive? Do you what parts need to be replaced?

for a 2 stroke
no (depending what has to be done)

but for the first few time it might be a bit hard but ill get easier

 

[dinot71]

I am no expert on 2 cycle engines but I thought they did not have valves like a conventional engine

 

[Bluethunder3320]

thats right.. my bad. forgot it was a 2 stroke.

4 strokes have valves.

 

[Russ2251]

May not need rebuild. Test run to see if performs to your satisfaction.
Should have kick a$$ power and speed and is not for beginners.
If it doesn't scare the crap out of you, there may be a problem.

 

[Bluethunder3320]

what rpms do these things do?

 

[dinot71]

May not need rebuild. Test run to see if performs to your satisfaction.
Should have kick a$$ power and speed and is not for beginners.
If it doesn't scare the crap out of you, there may be a problem.

I will let you know tomorrow night about the performance after I test ride it I just hope I can start it with my drill.

 

[Bluethunder3320]

are these bump start?

 

[dinot71]

what rpms do these things do?

I think they rev up to 6000 rpm's

 

[Bluethunder3320]

I think they rev up to 6000 rpm's

sounds a little low for a 2 stroke.

i found 12000

http://pserraracing.com/products/comer.php

 

[Russ2251]

Where do you plan on racing?

 

[dinot71]

Where do you plan on racing?

I might just go to Englishtown for the Wednesday night open track nights. I do not know how long I will keep it. I am getting the cart for $250 so worst case is that I can always sell it for that plus the seat it needs to make it road worthy. Do you know where I can get a cheap used seat for it that will bolt to it?

 

[anderkart]

You'll probably find your best deal on a used race seat asking the racers at your track if they got any for sale. Its pretty common for racers to gain weight and have to buy a new-larger size. Typical used seat prices range between $10 and $50. You just drill holes in the seat to fit your mounting brackets and these used seats usually still work just fine with a few extra/unused mounting holes drilled in-em.

Comet has a seat-sizing chart and some lower priced new seats: http://www.cometkartsales.com/store/seats/seats1.htm
You might find a deal on a used seat here: http://www.seventh-gear.com/store/categories.php?cat=53

PS: You'll want your seat to fit very snugly to hold you in around the corners. When you go to the track ask some of the racers what size their seats are, and if you can just sit in their kart for a second to see how the different sizes fit you. Its very important to get a seat that truly fits you well.