- Location
- Valley Springs, CA
Couple pics of R & R tech
Super Jet R&R racing ported cylinders
- Thread starter SJ 701X
- Start date
Couple pics of R & R tech
Half flip95
Formerly pondracer95
- Location
- Lake Havasu City AZ
easiest way to spot an old race boat, they all have the Budweiser sticker on the bottom deck.
ProSouth
Seriously, Don't be a dick.
- Location
- kawasakis suck
I'd love to get my hands on some of those bud stickers
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
There is nothing to see there
- Location
- Cruising Around
Careful with the mods. What he meant was that the "intake" area on a reed valve Yamaha would be in the cases. On the cylinder you have the transfer and boost ports. If you place the cylinder with the skirts up you will see if the transfer and boost ports have had any work done. Won't be able to tell much about port height from pictures. Hope this helps.
- Location
- the jetski grave yard
i totally agree with this guy but somebody has ground on the sleeve skirts to raise them a bit. any port work worth looking at will be the exhaust ports and the smaller transfer ports. like i said when you first asked about this cyl, it was ported back in the day and it looked like very mild porting by todays standards. the cases were probably / obviously ported to match that notch in the sleeve skirt. case porting has a much less effect on power than cyl porting.
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
Those two pictures show the bottom of the sleeves sticking down below the bottom of the cylinders....... No Pictures of the of ports are show. Transfers or Exhaust, No pictures of the of the tunnels leading up the sides of the cylinder walls to the transfers........... You did not post any pictures that anybody can look at and begin to give you any idea of what you have............................
Honestly, Personally when you start a sentence off with "Not to be a douche", usually you end up acting just like that................
Well that was the point, I knew I was acting like a douche. I have never ported a cylinder before so I have no clue what to look for. But I remember reading about how the boost port changed low end torque and how those fingers changed high end rpm. Sorry for acting like a douche but I was pretty pissed because I had to spend two hours just trying to remove the head pipe because the douche before me didn't use grease.
I'll get pictures of the whole underside tomorrow.
Sent from GS3 Synergy
- Location
- the jetski grave yard
see how small that exhaust port is? if it was wild instead of mild, it would be a lot wider and closer to those transfer ports. its hard to tell in the pix but i'm sure the transfers are all nice and cleaned up. its good, but it aint radical. and i see what looks like rust all over the cylinder sleeves. this tells me that the motor probably sat for a long time with moisture in it. that rust on the sleeves probably means rust on the crank AND crank bearings, which eventually turns into bearing failure. thats what you ended up with. did you get that rusty crank out yet and find the problem?
Yea I'm ordering a new crank from JM. I posted in the thread yesterday. The rear bearing was just starting to go. The transfer ports on the sides match the sleeves but the one on the intake doesn't. I'm not trying to do any back flips so this works for me right now. Next time the engine gets taken down I may screw with it but right now I just want to ride. The rust on the sleeves shouldn't hurt anything right? The guy before me had it rebuilt and then just put it in his garage for about five years. I'm going to replace the wrist pins and bearings as well.
Sent from GS3 Synergy
Sent from GS3 Synergy
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
That is another reason why you coat everything with oil. Rust. Run a light hone through it. You be fine.