Planet Minis

Walsh · 09-27-2009, 09:05 AM

I'm new to the whole pitbike thing but I can tell im already addicted. I bought a 94 xr80 for $100 a couple weeks ago and the motor had a bad case. I took a 86 xr100 motor I had and slapped all the 100 stuff in that frame. I took the 100 fork springs and put them in the forks and I also took the spring off the rear shock (it was blown) and put that spring on the 80 shock. The suspesion is ok for now I would like to upgrade later on. Now I have some questions for you guys who have experience building these.

Can I put the 100 swingarm on the 80 with the 80 linkage? Would it be benificial?

What is a good sprocket size and brand to run?

If I run the xr100 swingarm are the sprockets and chain differ from the 80's? (I know the length is different)

I've read a lot and it seems the FMF is the best buy as far as pipe. Anyone know where I can get a used one?

What is a good set of taller handle bars and would rather not have to replace cables.

What is a good rear tire to run on the 80 rear rim.

Anything better to do with my rear end besides a works shock?

I'm just basically looking for help building my bike and what parts to use.
I'm really interested in doing a cr85 front end but I havent read enough about it to understand what ALL I need to do the conversion. If anyone has any used parts they are selling let me know. I would be interested in just about anything.

firepower354 · 09-27-2009, 05:26 PM

How fragged is the 80 motor? I may have some swappable parts.

Walsh · 09-27-2009, 05:48 PM

The 80 motor is in good shape actually. It is a 94 and didn't have a whole bunch of hours on it because the bike was still super clean when I bought it. It must have threw a chain and busted the mount beside the flywheel that the sensor thing for the stator bolts to. Other than that its clean. I have the harness, carb, and airbox setup.

09-27-2009, 09:05 AM	#1 (permalink)
Walsh PM Newbie Join Date: Sep 2009 Location: Olney, Illinois Posts: 29	xr100 I'm new to the whole pitbike thing but I can tell im already addicted. I bought a 94 xr80 for $100 a couple weeks ago and the motor had a bad case. I took a 86 xr100 motor I had and slapped all the 100 stuff in that frame. I took the 100 fork springs and put them in the forks and I also took the spring off the rear shock (it was blown) and put that spring on the 80 shock. The suspesion is ok for now I would like to upgrade later on. Now I have some questions for you guys who have experience building these. Can I put the 100 swingarm on the 80 with the 80 linkage? Would it be benificial? What is a good sprocket size and brand to run? If I run the xr100 swingarm are the sprockets and chain differ from the 80's? (I know the length is different) I've read a lot and it seems the FMF is the best buy as far as pipe. Anyone know where I can get a used one? What is a good set of taller handle bars and would rather not have to replace cables. What is a good rear tire to run on the 80 rear rim. Anything better to do with my rear end besides a works shock? I'm just basically looking for help building my bike and what parts to use. I'm really interested in doing a cr85 front end but I havent read enough about it to understand what ALL I need to do the conversion. If anyone has any used parts they are selling let me know. I would be interested in just about anything.

09-27-2009, 05:26 PM	#2 (permalink)
firepower354 Advertiser Join Date: Oct 2006 Location: Flint MI Posts: 10,989 My Mood:	Re: xr100 How fragged is the 80 motor? I may have some swappable parts. __________________ If it has my name on it I did it;) FirepowerMinis.com Custom FPM parts and engines. Parts and service for all makes. Honda Trail Bikes parts and accessories. Pitster/Piranha/Thumpstar bikes, parts, engines and accessories.

09-27-2009, 05:48 PM	#3 (permalink)
Walsh PM Newbie Join Date: Sep 2009 Location: Olney, Illinois Posts: 29	Re: xr100 The 80 motor is in good shape actually. It is a 94 and didn't have a whole bunch of hours on it because the bike was still super clean when I bought it. It must have threw a chain and busted the mount beside the flywheel that the sensor thing for the stator bolts to. Other than that its clean. I have the harness, carb, and airbox setup. Last edited by Walsh; 09-27-2009 at 05:51 PM.

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