Kawasaki Triples Club

Wessiedave wrote:Not as straight forward as I hoped, I only have one triple and it runs fine, if I had a spare maybe I could consider having heads done and decking the barrels, let's see what next year brings

Tilly H2C wrote: ↑Sun May 29, 2022 10:28 am Anyone with any feedback on reprofiled heads on a H2? particularly H2C, not just the increase in hp which would be expected but also low speed running-Town type stuff in 30/40mph area's

husson73 wrote: ↑Thu Jun 02, 2022 4:06 pm At my knowledge you can't profile a H2 head w/o recharging the head.
It's possible on H1 w/o recharging the head and on S2 but with S1 head.
BTW H2 or H2C head is the same excepted the fact the outer fin is polished on H2B C.

husson73 wrote: ↑Tue Nov 17, 2020 10:30 am am Ralf Schipmann's head on one of my H2, great improve, nearly no more surge and better fuel consumption (around an average ofan half liter less per 100 kilometers) have ordered two other sets for my other H2

Tilly H2C wrote: ↑Thu Jun 02, 2022 11:28 pm

husson73 wrote: ↑Thu Jun 02, 2022 4:06 pm At my knowledge you can't profile a H2 head w/o recharging the head.
It's possible on H1 w/o recharging the head and on S2 but with S1 head.
BTW H2 or H2C head is the same excepted the fact the outer fin is polished on H2B C.

I had a spare set of heads reprofiled inc welding up first, I took this approach to keep the standard 'look' of the bike, the bike performs very well with the heads fitted, If the bike is
70hp std it must be close to another 10hp with them fitted, quite strong from mid range to top end, a change of clip position on needle sorted the fuelling once past 1/4 throttle

BUT in 30/40 limits on a very slight throttle (prob 1/16 to an 1/8th) the bike is horrible snatching at the chain, I spent ALL of last week trying to get the bike to run as sweet as it did/does on the std heads, I have:
2.5 and 2.0 slides, 5EJ15, 5FL14 and Ivans needles, a set of UFO with 15/17.5PJ and PJ's ranging from 32.5 to 42.5, I tried just about every combination carefully setting up and adjusting air screws/clip position.

Plus i set up the ignition plate to allow a +/- 5 degree swing to advance and retard

(Heads now also 'O' ringed and take a long reach spark plug, I tried B8ES. B9ES, and in desperation BP9ES (extended nose) with no better effect

It didnt seem to matter what I did to the carbs jet/needle wise, the chain jerking/snatchy ride remained

In the end I swapped the heads back and my nice smooth bike returned..............Any thoughts of advice greatly appreciated

Peter Mac wrote: ↑Wed Nov 04, 2020 7:49 pm The cylinders need decking 1mm to get the correct squish and compression ratio back as just cutting the stock heads means taking material away therefore lowering comp ratio , also need 1mm copper washers under the plugs to put electrode into the right place .. incredible results if done right

Tilly H2C wrote: ↑Thu Jun 02, 2022 11:28 pm

husson73 wrote: ↑Thu Jun 02, 2022 4:06 pm At my knowledge you can't profile a H2 head w/o recharging the head.
It's possible on H1 w/o recharging the head and on S2 but with S1 head.
BTW H2 or H2C head is the same excepted the fact the outer fin is polished on H2B C.

Every bike is different, you don't state what fuel you run?
I had a spare set of heads reprofiled inc welding up first, I took this approach to keep the standard 'look' of the bike, the bike performs very well with the heads fitted, If the bike is
70hp std it must be close to another 10hp with them fitted, quite strong from mid range to top end, a change of clip position on needle sorted the fuelling once past 1/4 throttle

BUT in 30/40 limits on a very slight throttle (prob 1/16 to an 1/8th) the bike is horrible snatching at the chain, I spent ALL of last week trying to get the bike to run as sweet as it did/does on the std heads, I have:
2.5 and 2.0 slides, 5EJ15, 5FL14 and Ivans needles, a set of UFO with 15/17.5PJ and PJ's ranging from 32.5 to 42.5, I tried just about every combination carefully setting up and adjusting air screws/clip position.

Plus i set up the ignition plate to allow a +/- 5 degree swing to advance and retard

(Heads now also 'O' ringed and take a long reach spark plug, I tried B8ES. B9ES, and in desperation BP9ES (extended nose) with no better effect

It didnt seem to matter what I did to the carbs jet/needle wise, the chain jerking/snatchy ride remained

In the end I swapped the heads back and my nice smooth bike returned..............Any thoughts of advice greatly appreciated