Team GPR

[Bert]

Dont give Scotty too much to do, He'll get grumpy.......... and demand alcohol :-)

Time frames (long timeframes) are the key. Either or he still demands alcohol, but we have been working on maturing his taste to smaller amounts of the good stuff.

Cool, we have to be REAL HARD on nylon from the start if anything gets going.
Also worth discussing the wording of resource consents...

If we get on then we will be very hard on a number of things.
Nylon and noise will be top of the list. Bike presentation will be up there as well.
If this does unfold then we will be starting it off slowly and full bike checks etc will be undertaken; if... We will not want to blow this as its taken nearly 10 years to get this this point...

Makes his own doesn't he?

Like Motorbike, Build 10.

Like Alcohol, Build some.

Like dyno, build one na build three....

[Bert]

Just as Mr Bucketracer thought he had enough to do; the team has decided that we all need to sort out the long forgotten 50's.

After digging around in the back shed (a multitude of engines & complete bikes have been uncovered).

Scotty has already posted the GT50; yesterday we pulled out the old RD50 (and a couple of semi complete RG50 engines). so there is likely enough to make 4 GPR F5 bikes (plus mine makes 5; shit almost enough for a GP within the team).... shit we are going to need a bigger trailer

So here's an update on mine (some will recall the last update; but now we are getting serious).

starting with an old TZ125 frame (saved from being butchered for a F4 bike) plus forks temporary from another project (will sort something else cheaper out shortly). DR200 swingarm modified to suit TZ linkage system (no, the TZ swingarm was robbed well before i got the frame by someone other than us)...

I was going to put in a RG50 engine; but yesterday we uncovered a YSR80 that turns out that bottom end is actually the same as a YSR50/RD50LC/DT50LC/TZR50 (good old Yamaha); minus the waterpump of the later LC models.

So to keep with my Yamaha fetish, the RG was removed. the YSR engine looks like it belongs in there.




Now there is a TZR50 barrel/piston/head on the way (ex-japan) and this build now might actually happen.



While it might not produce as much power as a RG50, I'm happy to have the Yamaha to complete the small two stroke set. (TZR50, TZR100/TZR250 & TZ250)...

[F5 Dave]

I'd chose the yam over the RG any day.

[mr bucketracer]

better post the rd50 bert

[mr bucketracer]

befor pic . .

[F5 Dave]

Remember that one well. But I meant TZR engine. DaveDs was fast.

[Bert]

better post the rd50 bert

as requested






discussion on Cams and effects (reference for me):
Cam Change:Typical effect
More Lobe Separation:Wider powerband, more peak power,smoother idle
Less Lobe Separation:Increased mid-range torque, faster acceleration, narrower powerband
More Duration:Powerband moved higher in rpm range
Less Duration: More low-end torque
More Overlap:Improved signal to carburetor, lower fuel efficiency, potential for reversion
Less Overlap:Improved low-rpm responsiveness, better fuel efficiency, engine may run hotter


Read more: http://www.circletrack.com/techartic...#ixzz2qIfFzvmS

[jasonu]

Remember that one well. But I meant TZR engine. DaveDs was fast.

A bit faster than a good RG50 but heavy and unreliable.

[mr bucketracer]

who can help me , i have stuffed up , i need a 36 - 37 tooth 520 spocket blank , think i'm over racing at the moment

[koba]

520?
You taking up superbikes?

Sorry, can't help with a sprocket.

Really bad weekend for you guys!
Still, you know they win when going good.

[koba]

http://www.waikatobearings.co.nz/any...3b7900p314.pdf

Maybe?

[Bert]

who can help me , i have stuffed up , i need a 36 - 37 tooth 520 spocket blank , think i'm over racing at the moment

It will come right soon buddy.

520?
You taking up superbikes?

Sorry, can't help with a sprocket.

Really bad weekend for you guys!
Still, you know they win when going good.

Svx550 is my guess.. What kind of rims are they Scotty??
It might be a case of trolling the jt sprocket listing and finding something to work with.

[mr bucketracer]

It will come right soon buddy.



Svx550 is my guess.. What kind of rims are they Scotty??
It might be a case of trolling the jt sprocket listing and finding something to work with.

no idea what the rims are vtr maybe differt hub maybe ? anyway the 50 build is happing untill i die.....maybe lol

[seymour14]

A bit more video from the latest racing at Kaitoke a few days ago. Bit of Saturday entertainment.

[F5 Dave]

Scott was getting some killer exit from that top corner and obviously some serious poke. I was having troubles trying to keep in touch in first couple of races.

what happened by pit wall? Carb starve?