ESE's works engine tuner

[husaberg]

As Dave said earlier on Yamaha were instrumental in keeping the 500GP's interesting.

As Husaberg said Dave said earlier on Yamaha were instrumental in keeping the 500GP's interesting.

[TZ350]

Piston specs here inc ring peg locations
http://www.pvlsverige.se/vrm/kolvar/kolvar.html

This is real Gold

[husaberg]

This is real Gold

There is a Zundapp piston in there that looks like it would work in a Bucket.
The catalog was found in a link buried in a thread somewhere. I have never tripped over it in Google.

This seems to be the home page and it is a awesome resource http://translate.google.co.nz/transl...26prmd%3Dimvns

They do carbs as well http://translate.google.co.nz/transl...26prmd%3Dimvns

[wobbly]

Small problem you have overlooked with that piston.
Its only 50mm long and with a 100cc bucket we are usually using the 50.6 stroke cranks, thus the exhaust port will be exposed to the case when the piston is at TDC, unless you raise the port floor.
The 1.2mm ring is too wide to be running over 14000 rpm as well, and the huge hole they have around the pin will create port linking issues with a wide T port or a big 3 port setup.
The 50mm oversize RM85 pistons I got are 51mm long, just enough to work OK, as are the 50.5mm CR85 +3mm ones for Mikes engine.
Also the TM carb is an old design, one of the first semi flat slide carbs - the later TMX and PWK types flow alot more air due to much superior slide shape.

[TZ350]

The 50mm oversize RM85 pistons I got are 51mm long, just enough to work OK, as are the 50.5mm CR85 +3mm ones for Mikes engine.

Sample image and text from husabergs link. The RM85 will be there some place and lots of other pistons there to look at too.



Wössner smidd kolv till Kawasaki KX 85 8102DA-8102D500

Wössner Smidd kolv passande Kawasaki KX 85 2001-08
Två smörjhål på kolven mot bommen
Kolven finns i sex olika storlekar från standard till största ÖD.
48,45 48,46 48,47 51,95 52,45 52,95mm.
Höjd totalt 54,30 mm.
Höjd till kolvkant 52,00 mm
Avstånd från centrum kolvbult till övre kolvkant 26,00 mm.
Kolvbultsmått 14 x 38,60 mm.
En chromemolyring höjd 1 mm.
Kolvringslåsning klockan 5.
Kolvbultslåsning medföljer

Pris 975 kr

husabergs link

Piston specs here inc ring peg locations
http://www.pvlsverige.se/vrm/kolvar/kolvar.html

[husaberg]

Small problem you have overlooked with that piston.
Its only 50mm long and with a 100cc bucket we are usually using the 50.6 stroke cranks, thus the exhaust port will be exposed to the case when the piston is at TDC, unless you raise the port floor.
The 1.2mm ring is too wide to be running over 14000 rpm as well, and the huge hole they have around the pin will create port linking issues with a wide T port or a big 3 port setup.
The 50mm oversize RM85 pistons I got are 51mm long, just enough to work OK, as are the 50.5mm CR85 +3mm ones for Mikes engine.
Also the TM carb is an old design, one of the first semi flat slide carbs - the later TMX and PWK types flow alot more air due to much superior slide shape.

Party Pooper
I must admit it looked short. But I recalled the MB100 was about 50mm so I thought it would be sweet.
On closer Exam the MB100 is about 60mm Whoops.Over 14000 really?
The 1.2mm are a bit wide by competition standards but they are Heaps narrower than the std Mb100/H100 rings which are 1.5mm keystones.

I posted the old Mikuni as it was a ready made kit for the Honda bucket in a legal size for a 125cc AC bike.
If you like the newer carbs here's some for you.
They are on the same site.
Did you have a look at the link to the piston site Wob?

It is probably the best 2 stroke piston site I have seen?

As well as plenty of Rod stuff and lots of other good stuff.

[TZ350]

....Whoops.Over 14000 really? ......

Speedpros,( red line ) is kissing 13,500rpm and I think the new design calls for 14,000+.

The other lines are my attempts to keep up with the big boys.

[koba]

The other lines are my attempts to keep up with the big boys.

That green one is looking pretty good!

I'm still not convinced any of these super powered 25hp+ motors are going to be rideable on a kart track by anyone but a super fast rider with all the best handling and suspenders.

Different story on a big track tho... oh look the GP an BOB are run on big tracks!

Nevermind my babbling, as you were...

[husaberg]

That green one is looking pretty good!



Different story on a big track tho... oh look the GP an BOB are run on big tracks!

Nevermind my babbling, as you were...

F5 Anyone
This left me speechless

It is a Honda 50 converted to Rotary valve and a LC Derbi top end and Minerili crank.

Whats the go with these bearings?

http://translate.google.co.nz/transl...26prmd%3Dimvns

Go to the bit with the face and the thumbs up.

[koba]

F5 Anyone
This left me speechless

It is a Honda 50 converted to Rotary valve and a LC Derbi top end and Minerili crank.

Jeebus! that is pretty flash looking stuff!

EDIT: So that MB50 cases yeah?

[Henk]

And here am I, dicking about with 30 year old XL100 motors to try and throw some sort of F5 bike together

[koba]

And here am I, dicking about with 30 year old XL100 motors to try and throw some sort of F5 bike together

Sounds all G to me.

[husaberg]

Jeebus! that is pretty flash looking stuff!

EDIT: So that MB50 cases yeah?

I think so, But I havent seen the NSR50/80 close up though so not sure.
There was a ns50f AC08 that had the saame engine as the NSR50/80 that was very similar looking motor to the mb AC01 only liquid cooled off the primary drive.I have never seen a MBX50engine either AC03

[husaberg]

And here am I, dicking about with 30 year old XL100 motors to try and throw some sort of F5 bike together

The Mb50. If that was it is indeed based on. Is also 30 years old now.
In-fact probably closer to 40 if you count the MR50 engine.

[koba]

The Mb50. If that was it is indeed based on. Is also 30 years old now.
In-fact probably closer to 40 if you count the MR50 engine.

That's a minter!