Proposal to delete rule 24.2.1 - Alcohol based fuel or fuel additives are prohibited

[husaberg]

I seem to remember we all used RG400 pistons in our TF's, 14mm pin 50mm bore plus oversizes. Cheap and thousands still available today http://www.ebay.com/itm/SUZUKI-RG400...8369ec&vxp=mtr . Whats more there are thin ring race variants available as well. Not nearly as sexy as a 52mm Strike though.

there are the thin ring variants i wouldn't mind seeing them.
Funny re the OS as i thought they were plated bores?
Oh maybe not.........

but 2 mm put them at 52mm LOL
The few i have seen that have used the 400 pistons reported shedding of the rings.
Busa pete?

[mr bucketracer]

yeah but they are all old stock now not likely to be remanufactured and not so cheap either, from memory the wiseco ones are 2 ring as well is that right.

yes 2 rings , i just run the top ring , i payed $100 some years ago . the other is rg400 pistons ( i see already said ) but same promblem are they out there . who can help me find a 65mm cbr150 piston( forged) , snail net to slow

[kel]

[QUOTE=husaberg;1130706684]The few i have seen that have used the 400 pistons reported shedding of the rings.QUOTE]

Rings were fine, the skirts would crack, but those were the OEM's. RG400 has iron bore.

[kel]

but same promblem are they out there

yep aftermarket 50, 50.5, 51, 51.5 and 52mm all readily available and pretty damn cheap compared to what I pay for my Wisecos.
And its not just RG400 pistons in these sizes, but Im not sharing.

[husaberg]

yes 2 rings , i just run the top ring , i payed $100 some years ago . the other is rg400 pistons ( i see already said ) but same promblem are they out there . who can help me find a 65mm cbr150 piston( forged) , snail net to slow

I think i have deleted it but in about April 2012 i sent Rich a link to a site that have many many forged pistons to suit the 2 and 4 valver foul strokes.( i am happy to share)
no idea re the quality though..........

[mr bucketracer]

I think i have deleted it but in about April 2012 i sent Rich a link to a site that have many many forged pistons to suit the 2 and 4 valver foul strokes.( i am happy to share)
no idea re the quality though..........

was it this site http://www.tkrj.co.jp/product/m-piston-kit.html#h

[husaberg]

was it this site http://www.tkrj.co.jp/product/m-piston-kit.html#h

No they were forged
It would have been Feb 2012, where are you rich?
I had to delete a lot of sent items.
I would have sent it to kicka as well about then

[TZ350]

yep aftermarket 50, 50.5, 51, 51.5 all readily available and pretty damn cheap compared to what I pay for my Wisecos. And its not just RG400 pistons in these sizes, but Im not sharing.

http://www.ebay.com/itm/SUZUKI-RG400-GAMMA-1-0mm-OVERSIZE-PISTON-SETS-RG400-2/141221592096?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222008%26algo%3DSIC.MOTORS%26ao%3D 1%26asc%3D20131003132420%26meid%3D6166461390313735 400%26pid%3D100005%26prg%3D20131003132420%26rk%3D1 %26rkt%3D6%26sd%3D130787011052&rt=nc

1.0mm OS RG400 piston sets, it looks like $109.38 NZD for a set of four.

So it looks like there are plenty of suitable pistons for the different 100cc engines.



Looks like the myth of needing a 107cc oversize allowance and 52mm + pistons because there was nothing else suitable for a 100 in the 50mm bore size is well and truly busted.

[mr bucketracer]

No they were forged
It would have been Feb 2012 where are you rich
I had to delete a lot of sent items.
I would have sent it to kicka as well about then

oh well will wait for the mighty rich .. thanks for your help

[husaberg]

http://www.ebay.com/itm/SUZUKI-RG400-GAMMA-1-0mm-OVERSIZE-PISTON-SETS-RG400-2/141221592096?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222008%26algo%3DSIC.MOTORS%26ao%3D 1%26asc%3D20131003132420%26meid%3D6166461390313735 400%26pid%3D100005%26prg%3D20131003132420%26rk%3D1 %26rkt%3D6%26sd%3D130787011052&rt=nc

1.0mm OS RG400 piston sets, it looks like $109.38 NZD for a set of four.

So it looks like there are plenty of suitable pistons for the different 100cc engines.



Looks like the myth of needing a 107cc oversize allowance and 52mm + pistons because there was nothing else suitable for a 100 in the 50mm bore size is well and truly busted.

Say what on a piston for a bike made nearly 30 years ago for a couple of years as a jap market only bike that you have to buy sets of pistons for in sets of 4. (I guess 2 of which will be different)
But these 4 are All the same size LOL) ship them from Japan.....have 2 sizes only .5mm apart that could work
these are made for a STD road bike reving to about 11000 Yet that no one is able to tell us where you can get pistons with decent rings (Kel says you can but can't prove it)for engines to rev to 14000rpm
.........and you say myth busted, i think maybe your option is plausible (at a push) and only if i are being generous.

The strike pistons are available in any size from 52mm in tiny increments that do no need boring just honing and they are available at pretty much any Kart shop in the country at bloody cheap prices........This equally freely available.............
then again its Far more than Kel has brought forward to prove that ethanol mix fuel doesn't provide a cooling benefit to an aircooled two stroke i would say.......

[husaberg]

oh well will wait for the mighty rich .. thanks for your help

I am pretty sure this was the company the origional site has moved
and it looks like the range has got far far smaller..........
http://jvt-racing.com/home/?cat=24

[Kickaha]

I am pretty sure this was the company the origional site has moved
and it looks like the range has got far far smaller..........
http://jvt-racing.com/home/?cat=24

Yeah but I can get 66mm forged pistons for my baby any day of the week

[jasonu]

http://www.ebay.com/itm/SUZUKI-RG400-GAMMA-1-0mm-OVERSIZE-PISTON-SETS-RG400-2/141221592096?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222008%26algo%3DSIC.MOTORS%26ao%3D 1%26asc%3D20131003132420%26meid%3D6166461390313735 400%26pid%3D100005%26prg%3D20131003132420%26rk%3D1 %26rkt%3D6%26sd%3D130787011052&rt=nc

.

Great price if they are any good. I don't see a manufacturer name or where they are made. Might be worth a punt though...

[husaberg]

Great price if they are any good. I don't see a manufacturer name or where they are made. Might be worth a punt though...

How do the front and rear piston rg vary?
if they have contra rotating cranks and reversed cylinders is it just the tolerances that vary?

[kel]

http://www.ebay.com/itm/SUZUKI-RG400-GAMMA-1-0mm-OVERSIZE-PISTON-SETS-RG400-2/141221592096?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222008%26algo%3DSIC.MOTORS%26ao%3D 1%26asc%3D20131003132420%26meid%3D6166461390313735 400%26pid%3D100005%26prg%3D20131003132420%26rk%3D1 %26rkt%3D6%26sd%3D130787011052&rt=nc

1.0mm OS RG400 piston sets, it looks like $109.38 NZD for a set of four.

So it looks like there are plenty of suitable pistons for the different 100cc engines.



Looks like the myth of needing a 107cc oversize allowance and 52mm + pistons because there was nothing else suitable for a 100 in the 50mm bore size is well and truly busted.

Yep. Guess we should pass the info on to MNZ and stop these lazy #### 100cc riders from being so, ahh, lazy!
Oh no wait that's not very nice. I know, lets not stop at 107cc as proposed, lets make it 111cc