Toning down RM65

johnmg · Nov 15, 2004

I bought a clean used 03 RM65 for my 9-yr old son after he outgrew his PW80. I am a little scared of this bike (and he is too) since it is so quick and don't want him to get hurt or be afraid of riding. Can I reduce some of the quickness of this bike by changing to a smaller rear sprocket? I think the stock sprocket is 47 tooth, if anyone thinks this would help, what size should I go to?

CaptainObvious · Nov 16, 2004

Yeah, every dad that buys his son or daughter a 65 jumps on the thing, gets into the powerband, does a wild wheelie, and then declares, "this thing is too powerful for little johnny/jane". Been there…thought that.

Relax. Your little one will be fine.

1) The bike is designed for a CHILD that weighs 60 to 90 pounds. The bike simply isn’t wheelie prone with the proper sized rider on them.

2) If the kid is scared of the sharp power delivery, they will short shift to say out of it.

3) Kids like power! Your little one will get use to it real fast, and in no time will impress the heck out of you.

No need to slow the bike down. Keep it stock and your child will love that bike.

Patman · Nov 16, 2004

Check with Steahly Offroad as they have 3 different flywheel weights (606/606l/606XL) for that bike. They can help you pick the one that is right for you (your son) and it's removable if the hit is wanted. I just got my son a 2003 CR85 that did the same thing to me because we ride the trees and with the FMF Fatty and Turbine Core this thing is wicked.

Ol'89r · Nov 16, 2004

johnmg said:
since it is so quick and don't want him to get hurt or be afraid of riding. Can I reduce some of the quickness of this bike QUOTE]

You can make a little tubing spacer to go on top of the throttle slide to limit the throttle opening. The spacer will go on top of the slide between the slide and the carb top. The throttle cable goes through the middle of the spacer and keeps it in place. You can shorten the spacer to give him more throttle as your son gets used to the power.

BE VERY CAREFUL that the spacer does not bind or interfere with the action of the throttle as to cause the throttle to stick. Recommend using aluminum or steel for the spacer, not plastic or something that will deteriorate and foul the carb.

Like rv6junkie said, the kids get used to the power pretty quickly and will soon be wanting more.

By going to a smaller rear sprocket, it will take some of the hit out of the bike but, it will also raise the top speed.

Just my $ .02.

Ol'89r

MarkSims · Nov 16, 2004

These bikes bog down low and reducing the rear sprocket will make it bog worse - causing it to be harder to ride. A flywheel weight or throttle limiter would probably help, as mentioned. The FMF gnarly would also make it easier to ride - if they make one for that bike. Another good solution is to send it to Eric. He'll port it so that the power comes on smoother and doesn't rev out as much, making it easier to ride. Then he'll port it again later for a wider powerband.

Toning down RM65

johnmg

CaptainObvious

Formally known as RV6Junkie

Patman

Pantless Wonder

Ol'89r

MarkSims

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Toning down RM65

johnmg

CaptainObvious

Formally known as RV6Junkie

Patman

Pantless Wonder

Ol'89r

MarkSims

Similar Topics

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