Team GPR

**mr bucketracer** · 2nd January 2015, 07:35

Originally Posted by F5 Dave

From ailing memory the RD was OK for the under 53cc rule on std 40mm and first maybe 2nd oversize as yam did 0.25 steps. Course the 100 rules are more restrictive. Perhaps we should campaign for a 106.5cc oversize. No hidden agenda. . .

Had to move ring peg. Use thrust washers and cut skirt depending on rod size.

thats the promblem with this ,gt125 bottom end with standard mb 50 pistons only just puts this within the rules , what is the max 100cc oversize ? has it changed form years ago ..not looked into it for 2 strokes

**mr bucketracer** · 2nd January 2015, 07:36

Originally Posted by TZ350

That is very impressive, another interesting and super special bike from GPR ....

thanks rob , not to bad off the cuff , your bike is looking like its getting there to

**F5 Dave** · 2nd January 2015, 08:52

104 never changed, unlike the 4stroke rule which has gone up 3 times. Just saying.

**husaberg** · 2nd January 2015, 09:01

It will never happen Dave those 100cc two strokes are just to fast, Look at all the GP results they are loaded to the gunnels with 2 strokes.
Even if the MNZ did allow to go to 108 or 111cc The four stokes and the 2t 125's (who have access to plenty of suitable)pistons would just demand more cc's anyway.
Then someone would try and attach an amendment to allow something else like Alcohol fuel.

**Grumph** · 2nd January 2015, 10:15

Originally Posted by husaberg

It will never happen Dave those 100cc two strokes are just to fast, Look at all the GP results they are loaded to the gunnels with 2 strokes.
Even if the MNZ did allow to go to 108 or 111cc The four stokes and the 2t 125's (who have access to plenty of suitable)pistons would just demand more cc's anyway.
Then someone would try and attach an amendment to allow something else like Alcohol fuel.

Oh bitter, very bitter....

Don't know how much commonality there is between the T90 twin and the 125. If the 90 crank is a drop in, there's a possible 100 w/c option. There used to be a few running in buckets way back when...

**husaberg** · 2nd January 2015, 10:34

Originally Posted by Grumph

Oh bitter, very bitter....

Don't know how much commonality there is between the T90 twin and the 125. If the 90 crank is a drop in, there's a possible 100 w/c option. There used to be a few running in buckets way back when...

Yes it is bitter but that is unfortunately the statue quo with regards to the piston situation for the 100cc 2 strokes.
re the t90/125 They share the same stroke My t90 has t125 pistons in it, the sleeve is plenty thick enough. I think the stinger had bigger carbs.
Scotts is a GT125 though.
The Wolf is pretty rare now. Not to mention 40 years old, shame to see any more of them busted up for buckets, not to mention they are piston port and have a 5 speed.

**mr bucketracer** · 2nd January 2015, 13:19

the 4 strokes had to go up , having 20hp 4 strokes with 25hp 2 strokes would not be right , i think everything is fair now , running alcohol in 125 air cooled 2 strokes would be just cheating , i'v seen enough of them that run fine as they are , just down to the rider , if the cc's went up say 5cc just let all f4 bikes go up ...simple

**F5 Dave** · 2nd January 2015, 14:17

T engine is a terrible choice. 5 speed, as wide as a barn, overly complex and iron 2 transfer barrels. Mine came from chch as an ex bucket. Its going the other way as a road bike. One day. Would have been finished by now if the 100 hadn't absorbed so much time fecking about with piston and crank work a rounds.

**mr bucketracer** · 2nd January 2015, 14:35

bloody electric water pumps)-; stoped and over heated engine , 5 ponys gone , hope it somthing simple without having to put new rings in it

**Bert** · 2nd January 2015, 14:38

Originally Posted by mr bucketracer

Attachment 307318first run up with the 100twin , no sezing up this time . 1mm larger stingers so good of the gas ..27hp 5 runs in a row , thought it was the pipe killing the rpm but now thinking its the 1989 rgv cdi box? just need to finsh putting back together now

Choice. That's a good result. Alway though that thing would produce good numbers.

Yes it could be the CDI box, I've got another one sitting here if you want to have a play? I think it's off a SP but would need to check serial numbers...
Or maybe time to try an ignitech on it.

Originally Posted by mr bucketracer

bloody electric water pumps)-; stoped and over heated engine , 5 ponys gone , hope it somthing simple without having to put new rings in it

Ass... Again.. Time for a decent waterpump. Or casting our own twin....

**mr bucketracer** · 2nd January 2015, 14:44

Originally Posted by Bert

Choice. That's a good result. Alway though that thing would produce good numbers.

Yes it could be the CDI box, I've got another one sitting here if you want to have a play? I think it's off a SP but would need to check serial numbers...
Or maybe time to try an ignitech on it.

ignitech would be the best but maybe the sp would work better as whats there?, i think all the plugs are cut off witch is a pain