Expansion Chamber

sorry folks can't seem to upload a picture.Any help would be greatly apreciated.

Post More Pictures!!!& how to post pics

How To Post Pictures

A little more detail here on posting pics
http://motorbicycling.com/f28/how-po...html#post32930

I hope this helps
If you need any more help Michael....just ask

Just using: Image: http://bike195.jpg

Will not work. You need to scroll down when making a post and click on manage attachments and updload it. OR get on a photo hosting site (or use your own site)

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Well this is very maddening!!! I managed to get the picture of my wifes bike on my profile if anyone wants to see it.My bike is the same type of set up . Their both incrediably FAST 40 mph +++ Power band is in low range middle range & high range.This expansion chamber is desigened for my tanaka 47r motor. Note my regular muffler added on to my silencer at end of pipe. It makes this set up really quiet. With no power loss. Allso note the blue rubber tubeing ,made to with stand very high temps. Theirs no leaks on this setup at all

Just installed expansion chamber on my bike using a 49cc setup as a donor, this thing is scary quick accelerating with my 44t. Now need to install my custom made reed valve, walbro hda63 and smaller sprocket to see what this thing can really do. I recommend this mod and the port mod to anyone who wants a smoother running engine, and added performance for cheap.

Good to see another convert Most people who experience a before and after with an expansion chamber on their motor tend to have this reaction and a few days later when they change the gear ratio to a lower numerical ratio they are plesantly suprised to feel a longer smoother surge of power that isn't the jump out from under you startling blast.

Where did you get your reed valve conversion ? I'm sure that will mellow out the piston port induction too.

I dont mean to hijack anyones thread but i plan to do a thread on this when im done performing it. I ordered a 49cc reed valve for a scooter off ebay and plan to make my own manifold. I looked into the pipelyne product and believe in supporting the small business but couldnt cough up the money they want for one. But their product will look nicer than what im thinkin of puttin together... but if it works and i saved some money than im happy

Jak - I am looking at the picture you posted. I think you need to get more of the shape of a set of cones, it looks too much like a larger section of pipe in the middle of a pipe. Also you will need to lose the original muffler, you have retained all the restriction. The muffler you see in the pic's the others have posted is for a two stroke and makes up the (Stinger) end of the pipe. Google "two stroke expansion chambers" I think this will help with your design. Have fun, Dave

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Chuck - The monkey has the spark plug again!

Has anyone taken the proper measurements for use in the program that was posted earlier?

I was thinking about trying to make one kind of like Jak is trying. Was hoping to try out using some reducers, etc to make the transitions...or anybody got measurements of their pipes?

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http://www.jasonhight.net/videos/mot...etowork-sm.wmv