XR200 tips wanted

**barty5** · 7th October 2011, 20:41

Originally Posted by nzspokes

So is it bad to paint an air cooled motor?

use a high temp paint itll be fine most of the old xr's and tt's where painted from factory odds are though it will flake off unless you clean and prep really well.

**nzspokes** · 7th October 2011, 20:58

Originally Posted by barty5

use a high temp paint itll be fine most of the old xr's and tt's where painted from factory odds are though it will flake off unless you clean and prep really well.

Fair enough. Was just going to be something to do untill I can get the motor to SME after 1.

Would have liked to have popped in to see you but my work is to busy to get away during the week at the moment.

**nzspokes** · 8th October 2011, 05:49

I may have found a 90s gearbox, would that fit my barrel and piston etc?

**nzspokes** · 8th October 2011, 17:15

Righto, big day. Went to SME and Alec wipped off the flywheel super quick. But.....

The flinger we had to mount in a press and use a 6 foot bar to undo it. Over tightned much?

So just now I split the cas and found, a tooth. Not one of mine but one off a gear. Not worked out which one yet but WOOT. Found a problem. Also looks like the timing chain was working its way through the case.

But hopefully all easy fixes.

**nzspokes** · 8th October 2011, 17:40

Well well well, anybody think this will buff out?

**barty5** · 8th October 2011, 18:03

Originally Posted by nzspokes

Well well well, anybody think this will buff out?

http://shop.thumpertalk.com/oem.asp?...982&model=4235

part number 10

i had few xr 200 gbox bit laying around ill have a look monday

**nzspokes** · 8th October 2011, 18:23

Is it 3rd gear? I need to sit down and read the excellent manual XRJohnny sent me before I start pulling gears off.

But very glad I now know and that its worth fixing.

**merv** · 8th October 2011, 19:17

Geez not something that ever happened to my XR for sure

**nzspokes** · 8th October 2011, 19:20

Originally Posted by merv

Geez not something that ever happened to my XR for sure

Trust mine to be special.

**husaberg** · 8th October 2011, 20:27

Originally Posted by nzspokes

Trust mine to be special.

Did the guy say what the rest was like and the big end and the starter gears any marks on the outside of the crank or rod.
ps try and keep the box and the crankcases matched if pos as Honda do like to change gearbox shaft length and play around with gears.

**XRJohnny** · 8th October 2011, 20:59

Hey Spokes, good to see you finally found the issue. Not one i,ve had myself, even though i assembled a gearbox years ago using the least worn parts out of a box of assorted worn gears. That thing lasted for many years but was finally blamed for a high reving blow-up. Turns out that the cheap aftermarket piston i had used let go, breaking its skirt & bits locking up the gearbox. Only consolation was, that i was racing a brand new RMZ250 on the beach at the time, & i was just in front!!
I heard a good old time story from back in The Day when your bike was a serious race weapon in modified form. A local character from Waipukurau called " the Dill " used to carry a spare 3rd gear in his toolbox & was prepared to change it at the track! HARD CORE.

**nzspokes** · 8th October 2011, 21:16

Originally Posted by XRJohnny

Hey Spokes, good to see you finally found the issue. Not one i,ve had myself, even though i assembled a gearbox years ago using the least worn parts out of a box of assorted worn gears. That thing lasted for many years but was finally blamed for a high reving blow-up. Turns out that the cheap aftermarket piston i had used let go, breaking its skirt & bits locking up the gearbox. Only consolation was, that i was racing a brand new RMZ250 on the beach at the time, & i was just in front!!
I heard a good old time story from back in The Day when your bike was a serious race weapon in modified form. A local character from Waipukurau called " the Dill " used to carry a spare 3rd gear in his toolbox & was prepared to change it at the track! HARD CORE.

Ive read of the third gear issue. Wouldnt want to do it at the side of the track.

Well this motor has the wiseco piston and porting job so should have awesome power....

But more likely it was just old. And probably the most used gear.

**nzspokes** · 10th October 2011, 12:44

Well picking up parts tonight. $150 for gasket set, cam chain followers, cam chain and the gear. Got to be happy with that.

Cam chains seem to an issue with them so doing it just in case.

**husaberg** · 10th October 2011, 16:46

Originally Posted by nzspokes

Well picking up parts tonight. $150 for gasket set, cam chain followers, cam chain and the gear. Got to be happy with that.

Cam chains seem to an issue with them so doing it just in case.

What was the head like Wobbly cam?