Recent content by sicivicdude

A while back someone asked the question, where all the brotherhood and camaraderie went around here. It left when people who are getting rolling get bashed for being competition. Ken, if in 1985 someone had "looked in" on your operation, would they have seen the operation it is now? I highly...

Per the user agreement, commercial signature links aren't allowed so here's the thread about it! I launched a website at the beginning of the year to showcase some of the work I've been upto! SCD-RACING is the place. I've posted pictures some of the blaster, polaris, and banshee work I've...

Optical illusion. It's the edge of where the coating that comes on them had rubbed off on the thrust face. Considering I don't EVER warm that engine up, it wouldn't be surprising if it was a little scuffed anyway, though.

I'm fairly sure that's not a boost port, that's just a piston for a YZ400. I've never worked on a hillshooter (or seen a successful blaster hillshooter). I have seen banshee engines disassembled that were used for that purpose and had piston boost ports cut into them (added to stock style...

I don't use cast pistons or recommend them to anyone else. It's how I get my case repair jobs, actually... so please continue to recommend them. My thoughts on piston boost ports without any other modifications: You won't feel much of a difference if any at all. You're not increasing volume...

No, it'll just explode in the bore and take out the cases and crank. MUCCCHHHHHHH better. 8-| 8-|

Ok, at that angle it's much clearer. It looked in the first picture series to be aluminum spalling off almost dead in the middle of the piston (like it was seriously hot and starting to melt though). The carbon on the bottom of the crown concerns me a tiny bit but real bad. If that's an...

That first piston picture, it definitely has a "hot spot" right in the middle. Was it lean?

What are you interested in? I've got a bunch of parts here that might tickle your fancy....

Be careful with squish areas north of about 60% of the bore area. During my experiments I cut a head which, by volume was acceptable but had a 65% squish area (deep combustion chamber) to try and get more "torque" from the motor. The head would detonate in mid rpm (as predicted by the head...

The clutch "pack" itself MUST start and stop with a fiber disc. There should be 7 fibers and 6 steels with ONLY fibers touching both the inner clutch hub and the pressure plate

You want to go wild and crazy? I was thinking about trying this on a custom headpipe. The idea is to basically add a "boost bottle" to the section of the exhaust tuned pipe where the charge resides after the pipe pulls the charge out (before it stuffs it back into the exhaust port) with a...

The FTZ's are complete replacement cylinders. CP industries replacement cylinders for banshee's also have powervalve options. Another thing to think of here, is the decrease in cooling capacity that will result from installing something in front of the exhaust port. The banshee head and RZ350...

Adding a powervalve to an engine that is not equipped with one isn't a "K.I.S.S" situation.... There will be a LOT of engineering involved. The vacuum actuated models are the most prolific (Rotax "RAVE" valve) but not as well controlled as mechanical (goverened) models. Simple spring loaded...

It's most likely the failed choke cable that's causing the hard starting condition and nothing more. I recommend a leakdown test just to make absolutely sure that's not an issue but I doubt it is....