Honda H100s Tuning - Team Mad Dog inspired

[cb1rocket]

Hi all

Does anyone know much about the H100 and H100s (also S2) in regards to tuning. I want to be able to achieve somewhere along half the power as they have quoted.

link is here https://www.teammaddogracing.com/H100s.html

I made a start by getting a CR125 reed block assembly and already found out that the fixing hole centres are too far apart!

Can anyone shed some light on any idea of parts from other Honda's of that era that I can fit and adapt for a bigger carb.

I'm lucky enough to have my hands on a mircron expansion chamber!

Please no replys saying don't bother and get a bigger bike comments. I have CB1 for performance and I hold a full license

[N cee thirty]

maybe send it off to stan stephens ?

20hp is pretty epic from 100cc though haha
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[Kickstart]

Hi

Biggest problem is gearing. They are low geared as standard (although think you can change one sprocket marginally now) and easily rev way past peak power on stock gearing. So any gain in power can't be used that much.

Other than that the main bearings will probably have a greatly shortened life.

There used to be a Micron pipe available for it and you should be able to port it out to get more go

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[cb1rocket]

[Kickstart]

Hi

What are the sprockets from?

A marginally bigger carb can be got from an MBX or MTX80. They are a fairly similar engine.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[stinkwheel]

I once got a very second hand and unreliable piece of info that an MTX125 reed valve block would fit.

An H100 goes pretty fucking fast as it is for a 98cc air cooled commuter bike though. I considered tuning mine then discarded the idea because it's entertaining enough as standard.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[cb1rocket]

[pepperami]

[Kickstart]

[G]

[cb1rocket]

[Kickstart]

Hi

Carb on its own doesn't really give you power. It just provides the fuel / air that other things use to give you power.

Like the diet for a tour de France cyclist. Gives them the energy they need, but if I ate it then it would just put more fat on me and make it harder to get off the sofa.

What it will do is make the bike a pig to ride at low revs. Whack the throttle open and it will just go to sleep (large carb with a low air speed through it just doesn't work properly).

A 28mm carb is easily big enough for well over 20hp (and 20hp would be very hopeful for an air cooled stretched moped engine), while a 32mm carb has an area over 25% bigger.

The carb alone shouldn't make it hole a piston. Most likely cause of that would be detonation, although it might well be that the pressure drop through a carb of that size is so small that it can't effectively draw fuel from the float bowl and runs lean at high rpm.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing