Honda Spree and Elite 50 Forums

Some day I may set up a pressure test system by plugging the exhaust port and manifold, but using the carb cleaner or propane torch seems so much more practical. Just mocked up my wild lion exhaust today. Definitely not a perfect fit. Fiddled around for some time. Ended up grinding of some weld and ...

I know that you want the exhaust port smooth as possible. What is the proceedure for smoothing? Some kind of polishing compound or wax?

I agree with keeping the cafe screen on. Looked at the first pic and thought sweet bike. Then I saw the short pipe! That space gain above the rear tire makes it look a lot cleaner.

Here's the thread I referenced viewtopic.php?f=1&t=14885

First couple pages deal with porting contriversy

Read a thread recently talking about malossi kits for sa50's and it said that the boost ports are larger than the same port on crank case, but that polini kits can be put on directly. Matching these ports was considered necessary. Is this true for a malossi port for af05? I'm taking my bbk off here ...

Got the 24mm oko and 4 reed manifold. Fabricated an adaptor plate out of sheet metal and mounted everything yesterday. Putting up some pics soon. These are the jets I got 1 x MAIN JET for PWK KEIHIN OKO #118 £2.90 1 x MAIN JET for PWK KEIHIN OKO #120 £2.90 1 x MAIN JET for PWK KEIHIN OKO #122 £2....

Finally started fitting my wild lion. Good News! The head pipe clears the fan cover. Bad News! The wild lion comes in two pieces and where the chamber pushes into the head pipe the weld is slightly too big for me to push it in far enough to reach the two exhaust mounting holes. Probably be grinding ...

depends on where the exhaust pipe makes power@ a certain rpm. yoiu have to match the intake transfers too.if your not sure what your doing, dont port it. you can screw it up really quick. it only takes 1mm to much to loose power where you need it. Yeah If I'm gonna probably not do any porting this ...

What about raising the port? what is a safe parameter?

You can do that but only if you ring ends don't limit how wide you can make it. Because if you go to far you have a junk cylinder. Do you mean if the opening of the ring is located were the port will be widened to? What's the limit on how far you can go up? The exhaust port would have to be closed ...

SpreeMadness520 wrote:Put a unifilter on, Those metal filters are terrible..

Is this true? I had a unifilter before but this metal one came with my intake and carb set.

here's a nice site on porting terminology
http://www.scooterinvasion.net/forum/vi ... er+porting

I've heard of the rule that your exhaust port can be widened to 68% of the width of the piston. Here's a site that deals with that topic http://www.scooterinvasion.net/forum/vi ... er+porting

Wondering if anyone has advise as to a proper exhaust port width?

Thanks. Don't have a box otherwise I would of had this info already

bump