Cr 500AF

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Jul 12, 2003
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#1
Im in the prosses of building a cr 500af.The chassis is a 2000 cr 250.I about have every thing to start putting it together.Til tonight,I droped the motor in and boy what a tight squeeze.Any ways the motor mounts dont line up.I am wondering if any one else has tried this,And what other problems will pop up and do you have a few sugestions.THanks,Mike
 

Yogurt

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Dec 25, 1999
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#2
Yea, your gonna have to have custom made head-mount stays. Also, I think someone on this sight maybe be able to provide you with the Pro Circuit pipe # you may need. Perhaps contact Service Honda, for they make CR500AF's them all time.
 
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Jul 12, 2003
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#4
Did any of you guys get your projects completed? I am in the process of building a cr 500 af right now,It is a 2000 cr 250 chassis and an 1989 cr 500 motor.Any suggestions or coments will be great.Also what pipe and silencer are you guys using.
 

KiwiBird

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Jan 30, 2000
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#5
You can use any pipe - just remove the rear mount. As for a muffle, that's a bit more work as the mounts are all different.
 
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Feb 24, 2003
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#6
if you really want that thing to fly you need to bring the motor to 87-89 specs,honda de-tuned them after that so they would start easy,i have found that careful setup on the carb. makes them start in three kicks max.cold-one all day long.the extra power is great.have fun and keep us informed.
 
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Jul 12, 2003
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#7
So cal,I have a 89 motor,I'm going to have Eric port it just as soon as i get the bottom end mounted in the chassis.I'm also going to run a 39 mm kehin pwk off of a kx500.My most conncern is cutting and rewelding the motor mounts.Does any body out there know how far to drop the mounts,and any other problems I should think about be for cutting the mounts?
 
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May 9, 2002
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#9
I have a 1998 cr250 and at 260 lbs am also interested in doing the cr500af conversion.Is there an easy easy source for parts.
 
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Apr 27, 2000
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#14
mtnuefer

With the gen 2 chassis you need to make a new front "y" frame piece were the exhaust bolts on as the 500 cylinder is taller.
Otherwise it is a fairly simple job. If you go to larrys page you will find all the info you need.

cheers
Red
 
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Jul 12, 2003
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#15
Red,it looks like to me I need to move the front motor mounts and the swing arm and bottom mount will line up once I've done that.That looks like the only hard part about getting this motor in.Do you know the part # for the pro circuit pipe and silencer.Any thing eles you can tell me will be help full.Thanks,Mike