Results 91–120 of 2024
Max Johnson — 6 years ago
Case volume is actually important. A stuffed crank really brings up peak pressures on a big cylinder, and can make up for massive ass transfer ports.Jbot: Embiggen your transfers! The huge, cut to the aluminum transfer tunnels on my Herolini cylinder flow like crazy and make raucous power. I need to figure out how to tune this Tillotson clone though, top end is determined by airbox restriction,
Max Johnson — 6 years ago
The issue with running that cylinder is that it needs something more like an estoril, not a french race pipe.Is it revving higher/shifting higher than it was before?
Max Johnson — 6 years ago
How much? I'm running one on my modded to hell herolini moby and I'm suspecting that it needs a LOT more initial advance...
Max Johnson — 6 years ago
48 can be pulled, but your off the line will suffer a little. Get a launch lever to help with that.
Max Johnson — 6 years ago
Is your variator opening fully at top speed and RPMs?The ceramic balls allow the stock variator to rev out higher before starting to shift. With the stock pipe and 15.15 on an airsal... Well, it might not have the revs, I recall those cylinders peak around 6 or 7K. A doppler can stretch that to 9k, but at the cost of overheating.What's the rest of your build look like?
Max Johnson — 6 years ago
Your pipe might be all wrong for your ports now, don't forget that opening them up like that can really raise the RPM at which power comes on.
Max Johnson — 6 years ago
Tomos is easier for non-wizards to own and maintain than a ZA.
Max Johnson — 6 years ago
I added ports high up on the piston to draw the majority of the fresh charge into the piston and across the wrist pin, it doesn't make as much power as a straight dump into the cases, but it keeps the piston cool.You're way too lean, your bike has no power because it's running out of fuel. Go up to a 90s range jet, and keep the 4 stroke atomizer. W7 needle should be fine. Your port
Max Johnson — 6 years ago
I've reed valved a couple piston port cylinders. Some are better to modify than others, though the best luck I've had is with AV10 reeds, and burying them in the intake port.
Max Johnson — 6 years ago
You could use a ratcheting bicycle shifter to control a pipe, or even preload on a variator contra spring.
Max Johnson — 6 years ago
Aux or semibridge that exhaust port and reed valve that sucker. Or I can cut you up a cylinder with those ports.
Max Johnson — 6 years ago
The plastic bushing isn't sealing and you Probably have an air leak. Derestrict the malossi, lap the mating surface and take the lip off the plastic bushing. Then get a viton O-ring to seal the carb to the intake.Also, check the dakar, some of them don't have the idle passage drilled right.
Max Johnson — 6 years ago
Bought three french bikes and spent money on them.
Max Johnson — 6 years ago
Nothing I ever did with that setup produced low cylinder head temps.Or call Erni Nera at EMC Technologies in Fall River, and ask him to sell you a gigantic billet aluminum cylinder head. I made them for precisely this issue and they came closest to getting that setup to run cool and reliable.But I've said too much already.
Max Johnson — 6 years ago
Motobecane cylinders run hot. I could never get my Airsal kit to run below 400F. Made a huge post about it a while back. Best I can reccomend is to get a retarding CDI box.
Max Johnson — 6 years ago
It looks pretty rad.
Max Johnson — 6 years ago
Actually, most durable, rippiest engine I've ever built now that I think about it is a hero puch with the indian kickstart e50. That engine has a Minarelli style clutch with a sprag, and it's got a ported, reeded hero on an estoril and low gearing.Because the dude who rides it it is 300 something lbs. it needed a lotta love because his budget was so low, but now it's perfect. Lot
Max Johnson — 6 years ago
Tha A3 cylinder will make less power because the divergent cone on the pipe can't pull more fuel from the carb. Also, probably isn't jetted right.
Max Johnson — 6 years ago
Chop a Tomos engine to the crankcase and run it on a french bike with a Gila kit and a doppler pipe.
Max Johnson — 6 years ago
No matter what you do, it will overheat and you will be sad.
Max Johnson — 6 years ago
So this rally isn't gonna be centered on L2S like last year?
Max Johnson — 6 years ago
I use 50:1 synthetic blend outboard oil, but I also ring land port and gas port Every piston I put in. they never stick rings, and they rev so much more cleanly.
Max Johnson — 6 years ago
The 77 kit is absolute garbage. The airsal kit is Grunty, but it's power making potential is mediocre. And I really did try everything. Reed valves, porting, Boost porting, doppler pipe, designed my own cylinder head and produced it... That cylinder kit is a path to pain and misery.So, the 77 kit is garbage and the airsal kit has the potential to ruin your Life.So grab the stock cylinder,
Max Johnson — 6 years ago
I've got a 64 in a ported and piped streetmate R, with an airbox made from a pill bottle and some air filter foam. Breathes great. You're probably really lean on a 58 jet.
Max Johnson — 7 years ago
Well, truck's dead. Gonna have to wait till the rally.
Max Johnson — 7 years ago
Well shit, how did I miss this?Seriously considering doing some triage and coming up there tomorrow.
Max Johnson — 7 years ago
Spent today getting my motobecane in tune, gotta replace a couple tires and tubes and get that gearing and variator figured out.Might or might not try and have a clutch pulley ready by then...
Max Johnson — 7 years ago
Is it okay if I just bring bikes and equipment and Ride this time? I dunno if I wanna cook again, I have a sweet bike this year.
Max Johnson — 7 years ago
Me and steve beck at moto throwbacks put that thing together from spare parts and the remains of a poor abused V1 AMF roadmaster.That pipe is the treats black and gold chamber. It's Okay. Dunno if he rebuilt the bottom end or not, but that bike coulda been through a couple owners in that time.
Max Johnson — 7 years ago
Stick with the A35, put the parmakit on there, a nice pipe and carb, and blow up those clutches.