Hi there everyone. My question is: Does anyone have the dimensions of a stock 66 cc chinese engines exhaust port? Also, the dimensions of the intake port would be nice too. Pictures of the ports ideally with a measuring tape wud be really appreciated as well.
Ill give a little bit of background at the end of my post, but the reason I ask this is that I am currently making my own exhaust header to replace the header that comes with the SBP expansion chamber that I find unsatisfactory and overly restricting. Also, I am replacing the stock pipe that comes with the expansion chamber, which is 1" outer diameter (7/8" id) with 1" inner diameter pipe that we have laying around at the shop. My idea is to increase the flow rate into the exhaust pipe before the point where it reaches the actual expansion chamber. So as you can see in the photo, I have machined out a new exhaust header plate which has a 1" drill hole in it. This will be the diameter of the pipe right from the get go at the header and onwards all the way to the beginning of the expansion chamber after which the flow gets brought down by the silencer.
Also, does anyone have any tricks for bending exhaust pipe to conform to your bike build? Ive been told you need to fill the pipe with a fluid under constant pressure to properly roll the pipe without it folding in on itself. I just wanted to ask if anyone on the forum has any tricks for bending/rolling their exhaust pipes cleanly.
Background
Yesterday I received my shipment from sick bike parts of aftermarket parts. I ordered a sbp expansion chamber, an add on muffler for the expansion chamber, an ADA racing high flow air filter, a copper fuel filter, an extra head gasket, and the noise deadening gasket material that fit inside the gear and magneto covers. All the parts are good quality pieces, they were well packed to avoid damage during shipping, and the shipping was pretty quick considering it was to Canada. Id recommend buying stuff from them, unlike some other distributors ive dealt with, they truly do everything to put the customer first imo.
Still waiting on my flying horse motor from bike berry. They screwed up and only shipped my order on monday, even tho I ordered it two weeks ago. Im also waiting on a Puch 50cc hi hi compression head to arrive from treatland.
Ill give a little bit of background at the end of my post, but the reason I ask this is that I am currently making my own exhaust header to replace the header that comes with the SBP expansion chamber that I find unsatisfactory and overly restricting. Also, I am replacing the stock pipe that comes with the expansion chamber, which is 1" outer diameter (7/8" id) with 1" inner diameter pipe that we have laying around at the shop. My idea is to increase the flow rate into the exhaust pipe before the point where it reaches the actual expansion chamber. So as you can see in the photo, I have machined out a new exhaust header plate which has a 1" drill hole in it. This will be the diameter of the pipe right from the get go at the header and onwards all the way to the beginning of the expansion chamber after which the flow gets brought down by the silencer.
Also, does anyone have any tricks for bending exhaust pipe to conform to your bike build? Ive been told you need to fill the pipe with a fluid under constant pressure to properly roll the pipe without it folding in on itself. I just wanted to ask if anyone on the forum has any tricks for bending/rolling their exhaust pipes cleanly.
Background
Yesterday I received my shipment from sick bike parts of aftermarket parts. I ordered a sbp expansion chamber, an add on muffler for the expansion chamber, an ADA racing high flow air filter, a copper fuel filter, an extra head gasket, and the noise deadening gasket material that fit inside the gear and magneto covers. All the parts are good quality pieces, they were well packed to avoid damage during shipping, and the shipping was pretty quick considering it was to Canada. Id recommend buying stuff from them, unlike some other distributors ive dealt with, they truly do everything to put the customer first imo.
Still waiting on my flying horse motor from bike berry. They screwed up and only shipped my order on monday, even tho I ordered it two weeks ago. Im also waiting on a Puch 50cc hi hi compression head to arrive from treatland.
