My chop chop

Hi im from Oz and this is my 2 stroke Schwinn in progress... I've done the usual mods including a severe dose of heavy porting.

I got bored so I polished the engine covers to a mirror finish - I reckon this looks much better than the same crappy slotted cnc covers that everybody has.... I also did a little porting and port-matching with the inlet manifold...

I've ordered a aftermarket cnc head as well as a 4 litre fuel tank that should arrive very soon... I'm gonna give the head a skim to raise the compression slightly just to give it shooting match a little more oomph... let's see what happens aye... lol

Check it out
 

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Chop-chop

Member
Joined
May 19, 2021
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79
I know this is not my original concept and I definitely don't plan to take credit for coming up with the idea... I remember seeing it on a friend's motorized bike many years ago and I've kept the idea on the back-burner .... until now, I'm gonna apply it to my own bike.

I'm currently in the hunt for an aluminium baseball bat or two, with the longest handle I can possibly find and I plan to adapt it to the Schwinn as an exhaust pipe. Perhaps stashing an expansion chamber of sorts in the guts of it and flare the big end out as the tip... I know it'll work because it's been done and it looks and sounds soooo chunky and beefy !! Also being aluminium means it can be polished up to a mirror finish !!
 

DAMIEN1307

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Jul 23, 2020
Messages
1,683
I'm currently in the hunt for an aluminium baseball bat or two, with the longest handle I can possibly find and I plan to adapt it to the Schwinn as an exhaust pipe.
That is an intriguing idea...i don't think ive ever seen that mentioned or done here as of yet...DAMIEN
 

Chop-chop

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Joined
May 19, 2021
Messages
79
That is an intriguing idea...i don't think ive ever seen that mentioned or done here as of yet...DAMIEN
Yea, like I'd said - I'm not gonna rip off someone else's idea and claim it as my own because I'm a strong believer of giving credit when it's due to it's rightful 'owner'... eitherway, it's a wicked idea and it would save hours in fabrication time considering it's got pretty much the ideal profiles for the job. The most that need to be done is to have the 'manifold' end bent to the correct shape to suit the exhaust path etc....the rest is done for you lol I've been looking on Ebay and going this way, a custom exhaust system can be had for no more than $20 bucks ! Also the added bonus being aluminium it's lightweight !!
 

Chop-chop

Member
Joined
May 19, 2021
Messages
79
Here's a Stihl Warbro-style chainsaw carb being adapted to a 47mm jug. The adaptor plate just arrived so I'm in the process of making up a heat insulation spacer out of a piece of nylon chopping board to go between the adaptor and the carb to prevent the heat at the cylinder from affecting the fuel/carb. I'm also waiting for the velocity stack and the air filter to arrive. All I have to do after that is to tap a vacuum pulse line from the transfer port to the carb to get the fuel moving....as well as getting the throttle cable set up properly. The advantage of running this type of carb is it has it's own high and low range fuel mixture screws allowing mixture adjustments on the fly without having to pull the damn thing apart to change the jets etc.... a very simplified process when setting up fuel delivery.
 

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