ESE's works engine tuner

[F5 Dave]

Ahh you mean DC? Back on board. Or another one? Sheesh mine will be a classic racer by the time I finish it & I'm pretty sure I started first.


Well I did the dyno thing & found all my lost horsepower on the 50 (was in the glovebox).

It appears the EGT probe was in a bit too far & really screwed things up. I'll not bother with it at Taupo & experiment when I have more time.

[TZ350]

A collection of the better links from the last few pages, more on pages 80 90 & 100

Two Stroke Tuners Hand-Book http://www.datafan.com/TunersHandboo...efiltered.html

GP125 18+ rwhp: skim the barrel 1.5mm and “o” ring it, thin alloy Spacer plate under the barrel and Suzuki RG250 pipe. Ex opens 86 deg ATDC and Trans opens 114 ATDC, std head , inlet timing 145/55 and carb mj 95.

The specs of Avalons Team ESE's BOB Suzuki GP125 20 rwhp engine:
Skim the barrel 1.5mm and “o” ring it, no head gasket, thin alloy spacer plate under the barrel and Suzuki RG250 pipe modified to RM125 specs, KX80 ignition. Raise the exhaust to open 83 deg ATDC, and widen to 70% of the bore, cut 30 deg from the closing point of the rotary disk, so inlet opens 145 BTDC and closes 85 ATDC. Champher the inlet side of the crank at 45 deg to aid inlet flow. Set the mj about 102.5 105 107.5 and ignition timing, 26-28 BTDC using a dyno. A link to Bells book and the RM pipe specs can be found on page 100 of this thread.

Cheep easy effective mods that most anybody can do and get 20 rwhp.

Internal Combustion Engine Heat Transfer Outline....http://www.engr.colostate.edu/~allan...ge1/page1.html

Forced convection and micro bubbles........
Check it out here:- http://www.liquidcooledairpower.com/lc-ridofheat.shtml

http://www.tz350.net/tz250page.htm portmap for the TZ250 from 1976 to 1984.

24mm carb for 30+ hp go-cart engines
Carb-01 http://www.out2win.com/catalog/images/ibeal5.jpg
Carb-02 http://www.out2win.com/catalog/ibea.html
Carb-03 http://www.j3competition.com/downloa...mologation.pdf

Expansion Chamber Design According to Blair:-
http://members.bellatlantic.net/~vze...es/expcham.htm

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[TZ350]

Well I did the dyno thing & found all my lost horsepower on the 50 (was in the glovebox).
.

I will think of a better place to hide your extra hp next time.

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[jasonu]

I have enough trouble remembering witch gear I'm in anyway why would I want more ?????????

and at 21hp @9500 why would it need more gears

5 gears and max hp at only 9500, you might run out of puff. Hope you have plenty of over rev.

[bucketracer]

5 gears and max hp at only 9500, you might run out of puff. Hope you have plenty of over rev.

Not to sure about TZ's, but Chambers and NedKellys have plenty of zing and Buckets4me has allways been a good performer and Avalon will have her own RS/GP.

[jasonu]

Not to sure about TZ's, but Chambers and NedKellys have plenty of zing and Buckets4me has allways been a good performer and Avalon will have her own RS/GP.

Good luck at the GP. I am looking forward to the pix and hopefully vids.

[Buckets4Me]

5 gears and max hp at only 9500, you might run out of puff. Hope you have plenty of over rev.

thats what the box of sprokets are for

pitty we didn't send any down with Ned Kelly's bike for the BOB

it's your bike Dave will be riding is it
the tz kwaka 100cc ???

going to be a good fast year this time

[B.Crump]

will you guys be racing on the new race track in tauranga ? (when its finshed) at the all terrain park from what i hear its going to be a nice track

all so when water cooling a head do i strip all the paint off first or leave it on? all so can i cut a bit of the fins away ? any one know were some pic's are?

[Yow Ling]

will you guys be racing on the new race track in tauranga ? (when its finshed) at the all terrain park from what i hear its going to be a nice track

all so when water cooling a head do i strip all the paint off first or leave it on? all so can i cut a bit of the fins away ? any one know were some pic's are?

You are decades away from needing water cooling, get it ported and going fast first, watercooling wont make it fast. the questions you are asking show you probably out of your depth

[F5 Dave]

will you guys be racing on the new race track in tauranga ? (when its finshed) at the all terrain park from what i hear its going to be a nice track

Yeah that's where we have all our next meetings planned. ESE may have to do some long travel suspension work & consider grooving those slicks a little deeper.:

[bucketracer]

when water cooling a head do i strip all the paint off first or leave it on? all so can i cut a bit of the fins away ? any one know were some pic's are?

Unless your restricted to 125cc if you need more power, simply fit a larger engine, plenty of older air cooled engines come up on trademe like GS400's etc.

[Buckets4Me]

Yeah that's where we have all our next meetings planned. ESE may have to do some long travel suspension work & consider grooving those slicks a little deeper.:

TZ350's bike had knobley tires on it when first brought
could fit them again

[jasonu]

thats what the box of sprokets are for

pitty we didn't send any down with Ned Kelly's bike for the BOB

it's your bike Dave will be riding is it
the tz kwaka 100cc ???

going to be a good fast year this time

Yes, but it hasn't been riden in anger for 12 years. Hopefully it will hold up.

[TZ350]

Yes, but it hasn't been riden in anger for 12 years. Hopefully it will hold up.

Great to see your bike is going to be out there.

There are certainly going to be some interesting bikes this year.

This is Chambers 22 rwhp 100 with 32mm flatslide RGV carb.

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[TZ350]

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NedKellys 20 rwhp bike being fettled after its trip to the BOB. Avalon will have one of her own but with a standard GP125 15 rwhp engine, we had to give ourselves some sort of advantage.

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