V3 P-85 Was Dynoed

[Sidewinder Jerry]

I apologize maybe I meant a 35% grade and not a 35° I'm not even 100% sure as to the specific configuration of the motor although I did have pictures posted The black one is the 100cc that I'm using stalk the motor was advertised as 6,500 RPM though after opening it up with a Dremel I'd say it's probably closer to 8:00 or 9,000 RPM GPS has shown with my ADCC that I could do 37 mph in conjunction with the speedometer that I had on there as well it was within a 1 mi per hour tolerance, My bike uses skinny tires I do not write it on the dirt as a general rule because they're 700C hybrid

I live in the Tennessee mountains where 30% grade hills are common. I'm 245 lbs and my bike weighs 100 lbs sometimes I pull 200 lbs in my trailer. I can go up those 30% grade hills with a total weight of 545 lbs at 8 mph. I use a 1.6 hp 33cc 4 stroke engine. This is only possible because I have a shifter bike with the widest reduction range in forum history 66.79\1 to 16.25/1.

Amazing what can be done always, good to hear of mods that take one beyond standard boundaries.

 

[radiatedmocha27]

The gasket for the bottom end that your holding was put on backwards at some point. That in itself will reduce power greatly. See the impressions that it left

Those were the original gaskets that were left on the 80cc motor when I took apart the black 100 cc I noticed similar impressions and I actually filed the gaskets down to the same shape as the transfer ports because while they did follow the shape of the block it was covering roughly 25% of the transfer ports down the side of the block

 

[radiatedmocha27]

I live in the Tennessee mountains where 30% grade hills are common. I'm 245 lbs and my bike weighs 100 lbs sometimes I pull 200 lbs in my trailer. I can go up those 30% grade hills with a total weight of 545 lbs at 8 mph. I use a 1.6 hp 33cc 4 stroke engine. This is only possible because I have a shifter bike with the widest reduction range in forum history 66.79\1 to 16.25/1.

Amazing can be done always, good to hear of mods that take one beyond standard boundaries.

I had entertained the possibility of a jack shaft with a double reduction system on it so I could achieve speeds closer to 60 or 75 mph cuz I would like to use this bike to break some land speed records without modifying the frame or the internals

 

[Jayraye39]

Those were the original gaskets that were left on the 80cc motor when I took apart the black 100 cc I noticed similar impressions and I actually filed the gaskets down to the same shape as the transfer ports because while they did follow the shape of the block it was covering roughly 25% of the transfer ports down the side of the block

dang never seen a gasket fit that bad

 

[Jayraye39]

I had entertained the possibility of a jack shaft with a double reduction system on it so I could achieve speeds closer to 60 or 75 mph cuz I would like to use this bike to break some land speed records without modifying the frame or the internals

you cant get thoes speeds out of a china girl motor. your looking at 50 tops. with every single mod you can do. if you want 65 + you need a minarelli like mine

 

[radiatedmocha27]

dang never seen a gasket fit that bad

It was roughly 25% coverage between the left and right transfer ports combined but I noticed a massive increase in torque after cleaning everything up although I was unable to get my Dremel into clean the castings on the lower part of the transfer ports so I did the next best thing by opening up the gasket, are you aware of the type of configuration of this motor such as it being a YD or a YZ and how do you tell the difference between them I'm still new to the block and head configurations on these bikes

 

[Sidewinder Jerry]

Also would having a 700C tire on the front of the bike affect the final drive ratio for the 26-in rear wheel?

If your sensor magnet for a bicycle computer is on the front tire then you'll have to calibrate it for a 700c tire.

However, if calculating speed using math you'd use the 26" rear engine driven tire.

 

[Jayraye39]

It was roughly 25% coverage between the left and right transfer ports combined but I noticed a massive increase in torque after cleaning everything up although I was unable to get my Dremel into clean the castings on the lower part of the transfer ports so I did the next best thing by opening up the gasket, are you aware of the type of configuration of this motor such as it being a YD or a YZ and how do you tell the difference between them I'm still new to the block and head configurations on these bikes

the 100cc bottom ends have larger transfer ports than the 80cc. They also use a 100cc stamped connecting rod. The bolt spacing on the cylinders is also spaced farther apart. But most obvious is the size of the bor

 

[radiatedmocha27]

If your sensor magnet for a bicycle computer is on the front tire then you'll have to calibrate it for a 700c tire.

However, if calculating speed using math you'd use the 26" rear engine driven tire.

I was running 37 mph originally with the 80cc motor on 700C tires and it was calibrated for 700C tires this new bike I literally just put back together yesterday after I was t-boned by a truck at 45mph and ruined my other frame from a Schwinn wayfarer hence the mismatched rims The rear driven wheel is actually the front rim that I had had that I removed the disc brake and swapped the sprocket over too with some shims to compensate for the slight decrease in axle width

 

[radiatedmocha27]

the 100cc bottom ends have larger transfer ports than the 80cc. They also use a 100cc stamped connecting rod. The bolt spacing on the cylinders is also spaced farther apart. But most obvious is the size of the bor

I have noticed that the bore size is significantly larger on this particular motor and I will also like to take note that the 80cc silver engine in the pictures below was a single piece head where is my black one is a two-piece as I'm sure you have already noticed it also had two base gaskets on the bottom which I decided to keep because they were already well-mated together.
Is there generally any stamps anywhere on the heads or the block to determine what type of configuration these motors are? Obviously it goes without saying that their displacements are well known but the only thing that I can find on my silver engine is a 2021-f80, and the black motor only has one tiny little stamp mark that I can make zero sense of lol