I have some good news!

[F5 Dave]

The engines are not the same from the base gasket up. Barrels & heads are different, the exhaust pipe exits at a different angle. Bottom ends are the same though the set up is to drop an MB50 6-speed into the cases.

Some H's have points ignition but MB50/100 will fit right on. Or air-cooled CR80 if you are serious. Both these (g-box & CR ign) items are now fairly hard to source. Keep the bike locked up Hel.

When built it it was set up for a hard hitting midrange like a supercross bike. Could have easily gotten more power from it but I didn't want to overstretch the chassis & suited kart tracks like that.

[Str8 Jacket]

It has the CR80 gearbox, right?....

[F5 Dave]

No a CR gearbox wouldn't be legal being competition based (don't know if it would have fitted anyway, might be the same). It has the MB50 6 speed.

The CR ignition is legal as ign are free to change.

[Number One]

Technical speak...

Time for another Margarita!

[Str8 Jacket]

No a CR gearbox wouldn't be legal being competition based (don't know if it would have fitted anyway, might be the same). It has the MB50 6 speed.

The CR ignition is legal as ign are free to change.

Sweet, cause I thought that it had a CR gearbox for some reason..... Did you EVER use all 6 gears on it? I think I have only ever used 3!

[F5 Dave]

On tracks other than the slipway yes indeedy.

I crashed it flat out in top gear in turn one off the old Taupo straight in a raining-cats-&-dogs F4 GP some years back. I got back on & set off (slowly until I changed back down a million gears) & started going hell for leather catching up places & watching a few people fortuitously falling off or bikes being flooded. I spent a lot of the later part of the 45 min race I later found out in 2nd place but let it go a couple of laps to the end after someone ran me off the track whilst crashing. When I took my leathers off they weighed about 40 kilos I was so wet.


If running real long tracks like Ruapuna or Taupo you will need a tooth or so on the front sprocket & there is a special mainjet extender I made up or it will starve for gas as the floatbowl runs out of juice (despite several other mods). I gave it to Ola, only run it on long tracks, never need it on medium (like back cct of Manfield) or small ones.

[Str8 Jacket]

Jeepers! So its pretty special to you eh?! What's the top speed of it do you reckon?

Ive had a couple of comments that it wouldnt survive long tracks as I was thinking it could be cool for a trackday at Manfeild.... I am thinking about taking it out for a run or two at the sprints in Sept. Standing quarters only, though I will need to learn to combat the wheel standing issue first!

[bungbung]

If running real long tracks like Ruapuna or Taupo you will need a tooth or so on the front sprocket & there is a special mainjet extender I made up or it will starve for gas as the floatbowl runs out of juice (despite several other mods). I gave it to Ola, only run it on long tracks, never need it on medium (like back cct of Manfield) or small ones.

Str8 has it.

[bungbung]

I am thinking about taking it out for a run or two at the sprints in Sept. Standing quarters only, though I will need to learn to combat the wheel standing issue first!

You'll want the tall gearing for that then

[bungbung]

Jeepers! So its pretty special to you eh?! What's the top speed of it do you reckon

I masked the true performance of the H with my superior riding skills
You'll find it 40kg faster too!

[Str8 Jacket]

Str8 has it.

You'll want the tall gearing for that then

Ah yes, I meant to say that I had it.... Yeah if i do take it out I will swap'em over. I am woried about blowing up yeat another bike though so I may just stick to bucket racing!!

[Str8 Jacket]

I masked the true performance of the H with my superior riding skills
You'll find it 40kg faster too!

Ha, and that much easier to wheelie! More pies and less of the exercycle me thinks!

[F5 Dave]

I'd be a bit scared of getting run over as the speed differential to a big bike will still be pretty high. Also it was tuned with the old pipe so I don't know how close the jetting is with the new pipe.

Run the 14T front sprocket on small tracks & 15 or 16 on bigger ones. Or something like that, might be 13 I can't remember.

[Str8 Jacket]

Cheers Dave

[Ivan]

I doubt youl blow it I had my RS a GP Engine running down therer flat in 6th on the stop maxing before the school and it stops revving on the gauge at 14000 everyone says thats crank blowing material I was sitting on about 16000 the needle kept going round and I looked and the engine was Vibrating like a Mother F%^ker the trick is as you slow down on a 2 stroke dont just suddenly close off as the bike will suck less fuel in meaning less oil at high engine revs and thats were they blow if you brake with thethrottle open and slowly back of youl be sweet and do what I was doing blipping the throttle as I slowed down to keep the fuel and oil sucking in then giving it a rev before I killed theengine at the end and never had trouble.

Honestly the quarter miles are only 400 metres long youl be sweet as on them I mean I didnt even fry a clutch on them.