One for the motor rebuilder guys...

[Jetblackchemist]

Done.

[Jetblackchemist]

Done.

[kartgreen]

Jetblack , I'm not sure there will be a gain in HP or torque but it certainly wouldn't hurt to remove the carbon buildup in the ports . To minimize any carbon bits in the combustion chamber , work on one port at a time with the e
haust valve closed , blow out with air and repeat on the 2nd. exh. port .
If it were me I think I'd use a stiff wire brush to hand scrub the ports , larger pieces of carbon can be removed with a screwdriver blade. I don't think I'd want a Dremel tool bit around the valve stem .

[Jetblackchemist]

Done.

[Smithers]

I know an old genius with these engines that made his own crankshafts, would heavily modify the cylinder heads and actually make piston rods and stuff to race these back in the day. Apparently guys used to get crazy and make their own parts! I'll be meeting up with him at a car show on the 14th I believe so I'll have to arrange to speak with him about this at his shop in the near future. He says he still have a couple of the engines and one that is even more modified but he never finished that one completely and ran it.

The only thing to hold us back playing around with their performance is lack of spare engines!

[bluerider]

I just jumped into porting my head this past weekend. Not so much a porting job as much as a clean up of some really ugly casings lines. I posted some pics on my engine rebuild tread.

Ryan, what car show? I would love to hear what you find out. If these motors are like some of the other honda's they could really benifit from a cam with a bit longer duration, nothng radical.

Robin

[Jetblackchemist]

Done.

[Smithers]

When the time comes I'll surely get some info to share don't worry. Modern steering dampeners are amazing devices! I don't ride sportbikes without them anymore! No way.

Blue - car and plane show at Paso Airport Saturday May 14th.

[Sam Green]

Thanks Kart, I will keep this in mind when I decarbonate later this week. You are very spot on about avoiding the valve stem, in my digging/research I found that messing in that area changes the thermal dynamics making the valves retain more heat in turn messing up the guides etc. many people hunting for hp gains have made that mistake and ruined a perfectly good motor. I am glad I asked and researched instead of just went at it. Although, it may have taught me some valuable lessons to relay to everyone here...but I am not that brash and brave to go experimenting with the only motor I have
~Jim

Jetblack, do as my namesake says, clean out the carbon deposits and nothing more.
You won't notice any difference by removing the casting marks.
The full factory race kit for this motor will only yeald 1bhp and it would cost you an arm and a leg and you've got as much chance of finding the parts as me becoming the King of England.
In the CA95, you have the best specs of all the Benly motors and making them go faster takes a lot of skill and hell of a lot of money.
I've been tuning and racing these motors since the early 60s and I'm getting to the point of giving up trying due to the cost of having parts manufactured to get the job done, ride it for what it is and enjoy the smooth ride.

Sam.

[Jetblackchemist]

Done.

[Smithers]

It's really easy. You probably won't have to replace any of the gaskets I would bet. Sea Foam is funny stuff.

[Jetblackchemist]

Done.