Project Sprinter, What Bike??

[deanohit]

Hhhhmmm, got me thinking how fast my bike could go now. 200cc of chinese crap. Maybe a hotted XR250 motor could be the go. Dunno bout streamlining though. I think your onto a good idea though, should be alot of fun.
Ya could streamline this. GN250 motor and already stretched long and low. Just get rid of those handle bars first.

[Drew]

Thats a great idea TB. Buckets'n'Bits if they were still in business.

I'm not sure Bryce would be into it, he's a hands on kinda guy, and I think the last thing he wants to do, is piss about with a bitsa in his spare time. Having said that, if somebody is serious about doing this, I consider Bryce a mate, and I'll ask him on your behalf. (Dunno if that's how he sees me, but I'm not that well liked anyway, so I can handle being told to sod off)

[skelstar]

Was thinking more in the sponsorship/donation area I guess.

[Drew]

Was thinking more in the sponsorship/donation area I guess.

Dunno how long I'd be allowed to scavenge through the warehouse before he did the maths on what it's potentially costing him, but again, I can ask.

Having said that, I wont be asking, if it's for a halfarsed backyard cowboy who's never finished a project in there life. Ergo, that counts me out as team leader

[Paul in NZ]

Have to pick something intrinsically cheap but common & not fragile. Old GN250 may sort of fill that need, but they did tend to kill themselves by rattling their heads to death, maybe that is more a symptom of the owners & maintenance.

XR500s are expensive & kill cranks & crankcases when hotted up. Pete has been modifying his for well over a decade & is a very experienced tuner & owns a wrecking business so has a handle on the spare parts avenue.

The GP PB did was a 125. To reach 100mph you need about 25bhp in a std small bike. Probably a GN with 18 real bhp could hit this in a streamliner/kneeler arrangement.

Pretty much my thinking thus far....

Of course.....

There is the mighty CB450 that lives in my garage.......... hmmmmmmmm, I wonder... (oh gawd)

OK - lets look at it differently then.. FZR400/250 or anything similar that you can buy race fairings for that has an alloy beam frame with a rooted engine. Find GN250 / trail bike / CB250/400, KH400/440 donk and voila??

The std twin shock type tube frame would be easier to modify though...

[Drew]

The std twin shock type tube frame would be easier to modify though...

And lighter\able. The only reason you cant make a GN handle is because of the weak as piss frame, luckily, corners are not the aim here, so it will do for the job.

My understanding is you wanna drop whatever to the ground, steel is easiest to work with for this purpose. A couple of pit bike wheels should be thin enough to create less drag, yet stable enough since it's unlikely to break 200ks without a serious budget blow out.

[F5 Dave]

Dunno how long I'd be allowed to scavenge through the warehouse before he did the maths on what it's potentially costing him, but again, I can ask.

Having said that, I wont be asking, if it's for a halfarsed backyard cowboy who's never finished a project in there life. Ergo, that counts me out as team leader

Ask him what he has in his pre-burnt section. May luck upon a cheap R1 engine.

[Drew]

Ask him what he has in his pre-burnt section. May luck upon a cheap R1 engine.

Might find an MV Augusta too, mbut lets not get our hopes up eh

[merv]

I used to own an A100, that I was gonna try and get the ton out of. Figured an expansion chamber, and a real carburator would do the trick, given that an rg150 does it out of the box with reletive reliability.

The four stroke single is definately the way to go, not sure how many of you have been at Manfield the last two rounds, but there's a guy in post classics on what used to be an XR500, mixing it with the front three bikes, a methonol burning GS1000, a tickled GSXR1100, and methonol Z1R.

Theres power to be had, in employing more recent engine technologies.

Nice one, back when I had more hair and rode an A100 myself my hero of the day was Tony Burrell (RIP) from Napier who was NZ 125 champion on his worked over A100.

The Honda 500 as F5Dave has mentioned is Pete Sales bike and he goes very well at Wanganui.

Man Paul you have a lot of options really, just got to find the right donor to start on. The CB450 might be a goer but I don't remember them ever really cutting it very well as a race engine unlike the CB77 before them.

[skelstar]

Koba (Malcom) has a big thumper in an NSR (?) chassis which he is selling soon I think.

[Bonez]

How about a gb400 chassis with NX650 donk?

[Deano]

Paul, the bike doesn't need a WOF to compete in the Cliff Hanger sprints, but it must pass scrutineering. I will double check the MNZ rules on hybrid bikes also but I don't believe it is an issue.

I can also attest to the big single theory - Chris Sales is #1 in Post Classic Junior on an old XR500 (VMCC) - I have heard it is quite highly strung but it sure has some poke.

[merv]

Deano doesn't Chris ride the Suzuki TM400 not the Honda? Pete is on the Honda isn't he or does Chris have one too or is it the same bike?

[limbimtimwim]

Suzuki TS185ER engine. Plenty of poke. And simple.

[tri boy]

Stripped back a XR500RB? (one with the reed block in the throat),
Lighten it, kitted the top end with wiseco slug, ground cam, ported head, and a Old CR smooth bore.
27" headers into a supertrapp muffler.
Oooweee that thing would get up. 860Gt Ducati of Jimmy "the Lizard" couldn't pull away in a straight line.(Av gas helps)

Sorry bout the pic quality, it was back in 86.