I've probably got about 72 or so hours of research for this build alone, and things are going to get exciting when I decide to go the Foureasy route with my next motor (Puch massive port kit and 70CC hi hi head on a happytime bottom end). But just to document what I've done so far:
Gently Ported stock jug with port matched intake and exhaust
Puch 50CC hi compression head
Chopped and kludged pocket bike exhaust pipe with kludged heat shield
Hookworm 26x2.5 tires
36 tooth sprocket
Reamed stock carb
Billet throttle, 2-into1 brake lever, toggle kill switch, and cushy springer seat.
Damp pro sound dampeners
Lots of little fidgets and upgrades over the last 4 years.
So how does it run?
Like a bat out of H3ll, I'm almost afraid what a spedometer will tell me. Torque still needs improvement, it Still doesn't like hills. For flat land and gentle inclines however, I'm finding myself looking seriously at picking up a set of riding goggles. Between the dry eyes/Drippy nose at full throttle to getting hit by a june bug in the face that felt more like a paintball impact, flat out top end performance is something I'm proud of. Let's look at how it happened.
Yep, the piston comes about 1.5MM from the top of the cylinder deck. And yes, that's a squish band on the Puch head. Quite an improvment over the stock head, and to give you an idea of scale:
Yes, it's a good three times bigger overall than the HT head. Same spark plug and everything, same bolt pattern, I'm amazed SBP isn't selling them as we speak. Treatland has them over here Puch 50cc Hi compression head And even if you don't want the extra compression, the huge amount of extra cooling will be more than appriciated on the long rides. I rode 30 miles Wide open throttle the other day with no overheating what so ever.
The pocket bike exhaust was from a failed project (That got me an A for my Associates degree final. No complaints) But you know how it is, Reduce, Reuse, Reconfigure. So, after the purchase of some silicone tubing from SBP and a trip to Sears for hose clamps and copper fittings, the pipe is mounted, and somewhat smelly. This may have to do with the Nomex heater blanket keeping my legs burn free, or the gorilla tape used to wrap it. This pipe is still undergoing testing, and will probably get some real welds soon instead of the Rube Goldberg assortment of pipe fittings and tubing it has now.
But I like the lines, and the pipe has made a difference in the power profile of the motor, although I haven't noticed the 'Coming on the pipe' feeling people mention when the exhaust is in line with the motor's RPMs. It could be the silicone tubing is absorbing and flattening the pressure waves. More testing needs be done.
But next on the list for mods is swapping out the clutch lever for a 3speed trigger shifter, swapping out the 2-into-1 back to the long brake levers the bike had in the first place, replacing the carb with a dellorto replica, and replacing the freewheel with a shimano megarange 34-14 7 speed. I'll post performance and pics this weekend!
Gently Ported stock jug with port matched intake and exhaust
Puch 50CC hi compression head
Chopped and kludged pocket bike exhaust pipe with kludged heat shield
Hookworm 26x2.5 tires
36 tooth sprocket
Reamed stock carb
Billet throttle, 2-into1 brake lever, toggle kill switch, and cushy springer seat.
Damp pro sound dampeners
Lots of little fidgets and upgrades over the last 4 years.
So how does it run?
Like a bat out of H3ll, I'm almost afraid what a spedometer will tell me. Torque still needs improvement, it Still doesn't like hills. For flat land and gentle inclines however, I'm finding myself looking seriously at picking up a set of riding goggles. Between the dry eyes/Drippy nose at full throttle to getting hit by a june bug in the face that felt more like a paintball impact, flat out top end performance is something I'm proud of. Let's look at how it happened.
Yep, the piston comes about 1.5MM from the top of the cylinder deck. And yes, that's a squish band on the Puch head. Quite an improvment over the stock head, and to give you an idea of scale:
Yes, it's a good three times bigger overall than the HT head. Same spark plug and everything, same bolt pattern, I'm amazed SBP isn't selling them as we speak. Treatland has them over here Puch 50cc Hi compression head And even if you don't want the extra compression, the huge amount of extra cooling will be more than appriciated on the long rides. I rode 30 miles Wide open throttle the other day with no overheating what so ever.
The pocket bike exhaust was from a failed project (That got me an A for my Associates degree final. No complaints) But you know how it is, Reduce, Reuse, Reconfigure. So, after the purchase of some silicone tubing from SBP and a trip to Sears for hose clamps and copper fittings, the pipe is mounted, and somewhat smelly. This may have to do with the Nomex heater blanket keeping my legs burn free, or the gorilla tape used to wrap it. This pipe is still undergoing testing, and will probably get some real welds soon instead of the Rube Goldberg assortment of pipe fittings and tubing it has now.
But I like the lines, and the pipe has made a difference in the power profile of the motor, although I haven't noticed the 'Coming on the pipe' feeling people mention when the exhaust is in line with the motor's RPMs. It could be the silicone tubing is absorbing and flattening the pressure waves. More testing needs be done.
But next on the list for mods is swapping out the clutch lever for a 3speed trigger shifter, swapping out the 2-into-1 back to the long brake levers the bike had in the first place, replacing the carb with a dellorto replica, and replacing the freewheel with a shimano megarange 34-14 7 speed. I'll post performance and pics this weekend!
