Best way to make an XR200 a Mid Field Gun

[Mick D]

This bloke might be able to offer some inspiration.

https://www.youtube.com/watch?v=4J_DxrBaWU0

Surely..your having a lend of us Fred?

[Gippslander]

am I dreamin or do the footpegs in that youtube clip go the "wrong way"?

[evo550]

This bloke might be able to offer some inspiration.

https://www.youtube.com/watch?v=4J_DxrBaWU0

Hmmm, interesting footpeg set up 

[PBMGold]

Reg, That Suzuki conversion is perfect, a really nice job and a bike I'm sure anyone would be proud to add to their garage.

Fred, I must be missing something but that conversion made my eyes bleed and my brain to ponder why wouldn't you just buy an XL185. The It was only a passable handler and not what you would call a think of beauty and it's only saving grace was a reasonably good motor. It was funny that the video spent so much time describing the unique footpeg placement and the fugly pipe setup. Beauty, truly is in the eyes of the beholder.

Thanks for sharing all the same.

[huskibul]

   Forward folding pegs aye ! Ive heard of thinking outside the square but thats thinkin' outside the planet ! Dont think id like to be the test pilot over a jump or log crossing with that one ! ?

[80-85 husky]

the guy just slides backwards every time he tries a hill and is sick of bending footpegs...

[fred99999au]

Yep, when I first saw it, it made my eyes bleed.

Comments on the vid must be heavily moderated too, as there are only good things being said, and I cant think of one.

Oh, and for part one in the series about how to install dissimilar parts into the new Hoonda engine, here that is. This will also make your eyes bleed.

https://youtu.be/y79Kax5Q0zQ

[Momus]

Well done, I like the back wheel , hope I get mine that good. I like some more photo's if you could. Very well done header pipe as well.

                  That header will be costing outputd I'd warrant- too restrictive out of the head. The SL 100 based engines all seem to go better with a down pipe. At least that HL style thing probably wont foul the wheel.

[bruce g]

Hi Brains Trust. I've always had a thing for the little XR200. Really sweet bike but everything is a little kiddie built - skinny forks, mild motor. I wonder if anyone has done or considered fitting an XR200 motor into either a CR125 or CR80 frame. My goal is to build something with better suspension, about the same weight or lighter and a wee bit more power than my KLX 250. It would be used for Vinduro and Evo class VMX so the frame would have to be a twin shocker.

Does anyone have any of the components to suit, eg 200cc motor or CR rolling frame? Thanks.

Hi PBMGold
her is some food for thought my 1983 XR200 ive prepped for the Viper series 2017
front forks have emulators and set up by wasp in SA
he also fabricated the rear shock
engine mods are  all my work as im a engine builder by trade
home made reverse cone exhaust
looking forward to racing it against the 2 smokers
heres a vid of it when i was setting ignition timming and carby jetting

https://youtu.be/msbxIcnqvgM

[PBMGold]

Bruce, That is a beautiful piece of kit and sounds awesome although I hope it doesn't exceed noise restrictions. Can you advise more details. The forks look like they have thicker stanchions and did I spy a hydraulic line to the rear brake?

Do you reckon that it will be competitive against 250 2 strokes?

I just love it. Please add pictures, thanks.

[tony27]

Some shots of the 91 framed bike in NZ


This is to connect the carb to the CR airbox, next picture will explain why

Carb is mounted 90deg across back of engine due to shock getting in the way

Kickstart has clearance issues with footpeg, next photo shows solution

Footpeg hooked out of the way

Sorry these were the only photos I got & I will be in the states for the next round so the next time I'll see it will be March

[evo550]

Hi Brains Trust. I've always had a thing for the little XR200. Really sweet bike but everything is a little kiddie built - skinny forks, mild motor. I wonder if anyone has done or considered fitting an XR200 motor into either a CR125 or CR80 frame. My goal is to build something with better suspension, about the same weight or lighter and a wee bit more power than my KLX 250. It would be used for Vinduro and Evo class VMX so the frame would have to be a twin shocker.

Does anyone have any of the components to suit, eg 200cc motor or CR rolling frame? Thanks.

Hi PBMGold
her is some food for thought my 1983 XR200 ive prepped for the Viper series 2017
front forks have emulators and set up by wasp in SA
he also fabricated the rear shock
engine mods are  all my work as im a engine builder by trade
home made reverse cone exhaust
looking forward to racing it against the 2 smokers
heres a vid of it when i was setting ignition timming and carby jetting

https://youtu.be/msbxIcnqvgM

Does that have a hydraulic rear drum brake???

[bruce g]

Hi Evo550
yes hydraulic rear drum brake just love tinkering with these old bikes the original cable missing and mount broken off the old frame so i thought up the hydraulic idea using a clutch master cylinder off a pit bike for the drum brake end, hand made all the bits works a treat but not race tested yet

[bruce g]

Bruce, That is a beautiful piece of kit and sounds awesome although I hope it doesn't exceed noise restrictions. Can you advise more details. The forks look like they have thicker stanchions and did I spy a hydraulic line to the rear brake?

Do you reckon that it will be competitive against 250 2 strokes?

I just love it. Please add pictures, thanks.

Hi PBMGold
Maybe with a good rider on it, but with me on it i will give the 125s a run for there money
even though the seat cover says 250cc its only a first oversize 200cc on the bore and std stroke
yes rear hydraulic drum brake home made set up ,the exhaust has the baffle removed its alot quieter with it in
I actually have pulled down the engine over xmas as i was not happy with the way honda secure the main bearings in the cases from standard when i first assembled I was abit unsure , as the ignition side of the case only has about 2/3rds of lip to stop the crank from floating
seeing this engine has the a rev limiter set at 13,000 rpm around 11,000 it had a bit of a vibration when i was riding it and tuning it
so stripped it down and realized the higher rpm was causing the crank bearings to turn in the cases as the way honda locates each bearing does not have a lot of material there
so did some measurements and have machined the inside of the cases to accept a circlip type bearing and removed the crank bearings and cut a circlip groove in them
with the cases bolted together there is a .005 crush on the circlip to case this should fix the loose bearing problem
also static balanced the crank using some mallory metal going back to gether over the new year
the rest of the engine has had heaps of mods
duel map digital crank triggered inner rotor ignition, .0435" lift roller cam,14:1 comp forged piston ,bigger inlet valve shortened brass guides and flow ported head, 32mm flat slide carby, barnett kevlar clutch,mega lightened crank took heaps of material off the sucker, home made 40mm exhaust and reverse cone exhaust, reworked the oiling system to supply straight to the cam and added a oil cooler
really looking forward to racing it next season
will post some photos of it when i put it back together

[Curtis]

Cant wait to see this thing in action!