Window always, always faces the intake. He's currently emailing me, and I'll make sure he spins the piston around. Our engines are sent with the top end unassembled, not sure how that happened but will work with the customer to resolve straight away.The windows of a windowed piston are NEVER FACING THE EXHAUST...They are supposed to aimed at the intake...Did you even read the OPs posting about the piston windows facing the exhaust with the ring pins facing the intake...Something is obviously not correct here.
Window piston?
I got a race engine from California motor bikes and the window was facing exhaust. I emailed them and they said that this is normal. But the engine won't start?motoredbikes.com
As you know from reading his post, he says the ring pins are on the opposite side of the windows...That means that if he does turn it around, the ring pins will be on the exhaust side which is NOT the way it is supposed to be...Heat stress alone will loosen the pins and seize the motor.
The pins will not fail. There are 2 factories currently making the 47mm pistons in China. One is exclusive to Runwell, and the other sells to Yangzhou Flying Horse, Yangzhou Woodpecker, and the piston is $2 cheaper per piston but the quality is worse.
I DO commend you in sending James another piston.
motoredbikes.com
And I note that in that picture, that the ring pins are on the correct side as the windows are as well and should be installed with BOTH facing the intake side.Confused as when I went to the site linked above... the windowed pistons being advertised show this photo:
Now... um... did the manufacturing change at some point? Am I looking at the wrong listing?
Dual Window Piston (Low Pin, Fits Wildcat/Runwell) | website
Includes (1) Window piston and (2) piston rings. Piston pin/bearing sold seperately. For use with GTZ ported cylinder and GTZ reed! Don't forget to get one!www.californiamotorbikes.com
Also... maybe you can answer... how does your $169.00 motor run vs a Phantom 85?
Photo is from bikeberry. Also, that's the cheaper version of the pistons. They are sometimes stamped with the number "3"Confused as when I went to the site linked above... the windowed pistons being advertised show this photo:
Now... um... did the manufacturing change at some point? Am I looking at the wrong listing?
Dual Window Piston (Low Pin, Fits Wildcat/Runwell) | website
Includes (1) Window piston and (2) piston rings. Piston pin/bearing sold seperately. For use with GTZ ported cylinder and GTZ reed! Don't forget to get one!
Also... maybe you can answer... how does your $169.00 motor run vs a Phantom 85?
I apologize that I did not get back to you on a timely basis. We were using an email provider that was sending non-spam emails to spam. We have a new customer service email, and respond within 24 hours to emails. That email is californiamotorbikeshelp@gmail.com.I DO commend you in sending James another piston.
I would be remiss though if I didn't tell you why I am not exactly a beliver in CMB though...I wrote you a year ago this very month inquiring about clutch pads at that time and was asking some questions about them...You never replied in all that time.
USA - California Motorbikes Reviews
Website: https://www.californiamotorbikes.com/ Products: 2 Stroke and 4 Stroke Engines, Complete Motorized Bicycles, Spare Parts for Motorized Bicycles Forum Username: Zane-CaliforniaMotorbikes Ebay Shop: https://www.ebay.com/str/californiamotorbikesstore Ebay Account...
So at least one of the photos on your site is actually a Bikeberry photo and not one of your own then???
