any H100 owners?

[alex25]

hi there all,

i purchased a go-kart which had already been fitted with a H100 engine,what model i dont know..this engine turned out to be faulty.

anyway i had to find a replacement unit and its not running right at all.

i used the coil etc off engine 1, is there a difference with the electrics on these 2 engines ?

also how would i find out what model of h100 i have?

thank u

[Kickstart]

Hi

There are 3 versions of the H100 in the UK. The older A model, and the S and S2. The easy way to tell the engines apart is the cylinder heads. The S fins run straight forward backwards, while on the A they splay out at the front of the head.

The A and S generators appear to be different, but the coils appear to be the same.

Have a feeling the H100S had electronic ignition but not sure.

All the best

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

[alex25]

thanks for that

the kart could idle all day, till u go to drive it, its very slow. walking pace.

it does alot of popping and banging then cuts out

any ideas anyone ? thank u

[27cows]

H100s had one of the least reliable engines ever to emerge from the land of Nippon.

The H100A had CDI, the H100S inexplicably reverted to points, and the H100SII went back to CDI again. But the engines are extremely fragile. It was common for motors to be completely worn out by 15-20K. Would suggest trying to find something more robust for your kartie.
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The RXS100: vehicle of choice for Chuck Norris

[Kickstart]

Hi

You can check the ignition timing (strobe light), but I would check the reed valves first.

All the best

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

[stinkwheel]

[alex25]

i was told the engine had low miles and was working etc, but thats what they all say eh,

i only replaced the engine with another h100 because the frame was made for the h100

with my wiring i have, coil and cdi box thats it

i have 2 photos of the kart to see anyone could spot what engine i have, that would be great, thanks

https://i34.photobucket.com/albums/d129/ll_sarah_ll/283807478.jpg
https://i34.photobucket.com/albums/d129/ll_sarah_ll/283807476.jpg

[Kickstart]

Hi

It is an H100S or S2 engine.

Put a filter on the carb. At the moment any grit will go in and cause damage, and the back tyre will probably fling grit straight at it. Will also run a bit lean due to the lack of filter which won't help things.

All the best

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

[Tristan.]

[Kickstart]

Hi

Good point.

That looks like a way larger than standard rear sprocket. Possibly 15 teeth between the "spokes" of the sprocket so a 60 tooth sprocket (standard is 35, front is 15 and you can't squeeze in anything bigger).

Stock gearing an H100 does about 20mph at 8500rpm in 1st gear. 60 tooth sprocket would knock that down to 11.5mph. An 11" tyre diameter would knock that down to 5.5mph.

Could well be running out of revs at little more than walking pace in 1st.

All the best

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

[alex25]

i has a filter there but it was off at that time, a non standard one, a k&n type.

i could drive it changing gears etc, but the pops and bangs caused it to die.

i believe the sprocket used is the H100

cheers

[alex25]

i will head out and count teeth on the sprocket and ill get a few more pictures etc

cheers

[Kickstart]

[stinkwheel]

[alex25]

i think its up in high 50's , i take it that its wrong? its pretty hard to count when the chain is on lol

its been put on with a ton of weld also, lol

[Kickstart]

Hi

Way too large. Flat out an H100 does about 60mph. The wheels being smaller will lower the gearing by about 50% anyway, bringing the top speed down to about 30mph. Going from a 35 tooth (stock sprocket size) to one in the high 50s will almost halve that again.

Or put it another, the combination of larger sprocket an smaller wheel will land up making 5th gear lower geared than the stock 1st gear.

All the best

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

[alex25]

do u think its pretty pointless doing anything with it?

tbh it was only bought to cure boredum lol.

cheers

[Kickstart]

Hi

Keep playing (at least to stop the popping and banging), and put a sensible size rear sprocket on.

All the best

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

[cb1rocket]

It could well be the engine is over revving as the clutch is knackered? Just a thought

[alex25]

it's not over revving at all, its not revving nearly anywhere its supposed to.as

i had it going today, when i rev it in neutral its wanting to die all the time, i couldn't drive it as the ground wasnt flat enough.,but when it does do its popping and banging

would the piston rings cause this or is it bound to be something else

thanks