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  #1  
Old 09-11-2007, 10:21 PM
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Default another beginer question...

Sorry for all the lame questions I've posted so far but here's another! Just got my kid a bike, rt 100, got a rebuilt engine off e-bay, when it arrived some of the fins on the top were broken off...still in the box and I suppose I could JB weld them back on, but my question is, should that fix be enough or is this going to cause some bigger issues? Thanks again
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  #2  
Old 09-11-2007, 10:32 PM
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Default Re: another beginer question...

what do you mean by fins? motor mounts?

post some pics if you can please. if its a motor mount i wouldnt try it, because the vibration would crack the jb weld back off of it
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  #3  
Old 09-11-2007, 10:38 PM
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Default Re: another beginer question...

My guess is that it's an air cooled bike and the fins are on the cylinder & head, meant to help cool the bike?

As for the question, I really don't know. How many of them are busted off?
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  #4  
Old 09-11-2007, 11:39 PM
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Default Re: another beginer question...

Quote:
Originally Posted by char393 View Post
My guess is that it's an air cooled bike and the fins are on the cylinder & head, meant to help cool the bike?

As for the question, I really don't know. How many of them are busted off?

if that is the situation, it may not hurt it to not have them.

idk a friend of mine had one of those bikes when we were kids, the thing wouldn't die. And i don't know anything about air cooled bikes really.

id still like to see a pic of what hes talking about
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Old 09-12-2007, 01:48 AM
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Default Re: another beginer question...

I'm not sure the JB weld would help disapate the heat like normal fins but, it would certainly be better than nothing.

Do you not have the jug form the other motor that you could maybe use instead? I know that might not quite work if the bore isn't the same any more.

Honestly, you'll probably be fine if there aren't too many missing.

I agree, a picture would speak a 1000 words.
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  #6  
Old 09-12-2007, 11:12 AM
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Default Re: another beginer question...

ya, they are the cooling fins on the cylinder head...there are 2-3 kind of half broken off on one side of the top...I really don't think it should be a huge deal...I do have the old motor i can swap the head off of but Im thinking its not in to good of shape and the new one I just bought is all rebuilt...so I dont want to mess with it to much internally. We'll give JB a shot and see how it goes
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Old 09-13-2007, 01:48 AM
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Default Re: another beginer question...

Well, good luck. I think it will be fine.
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Old 09-13-2007, 01:11 PM
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Default Re: another beginer question...

Lol Jon, if changing the head on an aircooled motor is something you consider "internal" and to be avoided, I think by all means you should change it. It also gives you time to see just how 'rebuilt' that engine is, so you can do some planning.

FYI, that critter should take larger topends too. Mail me a base gasket from your old one, and I can probably tell you how many it would take.
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  #9  
Old 09-13-2007, 06:02 PM
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Default Re: another beginer question...

ha, pretty much anything besides changing oil and adding gas is "internal" to me...Im a bit mechanicaly declined you could say.
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