Team GPR

[mr bucketracer]

Nah man, run the reed as well. Speedpro went down that path. Mill the block so its flatter like an RG250 or an RM, it will flow better. Had to go up a jet size.

oh man that don't help already f5 daved the reed hole lol

[speedpro]

got my rg50 engine out , if i was just to piston port it what inlet Duration should i run . thanks

200 or close to exhaust duration worked for me. I also thought that the intake tract was compromised by the reed opening. I bogged it over and went total piston port. The reed as far as I could tell only worked when the designed intake was used beyond it's design revs and the pulses met the closed piston port and then went through the reed. Long time ago. Seemed to work OK considering other things in the motor. Went full cylinder reed after that and got similar results. I bogged the reed cavity on a TS 100 and ran 200 degrees timing as well and it was an awesome engine with a big FAT 19.9hp

[mr bucketracer]

200 or close to exhaust duration worked for me. I also thought that the intake tract was compromised by the reed opening. I bogged it over and went total piston port. The reed as far as I could tell only worked when the designed intake was used beyond it's design revs and the pulses met the closed piston port and then went through the reed. Long time ago. Seemed to work OK considering other things in the motor. Went full cylinder reed after that and got similar results. I bogged the reed cavity on a TS 100 and ran 200 degrees timing as well and it was an awesome engine with a big FAT 19.9hp

cool thanks for that , thought i better try get a 50 ready for the gp

[speedpro]

You can experiment with piston port timing by trimming the piston skirt. Just before reboring is a good time to do it

[mr bucketracer]

You can experiment with piston port timing by trimming the piston skirt. Just before reboring is a good time to do it

half way through it i thought the same thing so made it 175 and will play with the pistion the rest, have not ported a 2 stroke for so long is was not that easy , only porting i have done of a late was the exhaurt of regans bike and the was easy to this 50cc thing

[mr bucketracer]

next time i race my bike i might get kerry to black flag everyone but me so i win (-; will feel like a rugby player then

[seymour14]

next time i race my bike i might get kerry to black flag everyone but me so i win (-; will feel like a rugby player then

There was no cheating in the rugby sevens...

The ref had eyes...

We won!!

[Aeromo]

Are your FXR motors 156cc?

[mr bucketracer]

Are your FXR motors 156cc?

off the top of my head 156cc or 157cc 64mm pistion max over size. mine is a 300 (-; lol

[Aeromo]

Oh sweet, does no one care its above cc limit? or is there a maximum oversize? Only asking as there is a 162cc kit for the honda

[mr bucketracer]

Oh sweet, does no one care its above cc limit? or is there a maximum oversize? Only asking as there is a 162cc kit for the honda

there is a % but can't find it , 300 taking the piss

[chrisc]

Appendix A of the MNZ MOMS: https://www.mnz.co.nz/docs/default-s...1.pdf?sfvrsn=2

The maximum capacity for rebored engines shall be:
F4 2 stroke 55-110cc
2 stroke 55-125cc air cooled - 130.5cc
4 stroke 55-150cc – 158.09cc
F5 2 stroke 0-50cc - 53cc
4 stroke 0-100cc - 104cc

[Pumba]

Oh sweet, does no one care its above cc limit? or is there a maximum oversize? Only asking as there is a 162cc kit for the honda

And the troll of the day award goes too...........

[Aeromo]

And the troll of the day award goes too...........

Lol your the troll piggy, i don't give a fuck if someone cheats, im new to buckets and know fuk all about engines, I wanted to know why on GPR site the FXR build was 157cc, When the class was 150cc. (that comment alone shows how much I don't know ha) I know of max piston sizes eg KT100 class max piston 63mm, I thought it would be similar with bikes but instead it states a cc limit not piston size. I haven't read MNZ rules properly,

Whens the next bucket race you attending piggy, so I can smoke you on the track

[Henk]

Lol your the troll piggy, i don't give a fuck if someone cheats, im new to buckets and know fuk all about engines, I wanted to know why on GPR site the FXR build was 157cc, When the class was 150cc. (that comment alone shows how much I don't know ha) I know of max piston sizes eg KT100 class max piston 63mm, I thought it would be similar with bikes but instead it states a cc limit not piston size. I haven't read MNZ rules properly,

Whens the next bucket race you attending piggy, so I can smoke you on the track

Wild guess piggy will be next turning up at the GP in Tokoroa 13th March, bring port.