Results 61–90 of 2297
Legendre — 17 years ago
I suggest you use a ball hone, in either case.
Legendre — 17 years ago
Take a look at the 'side gapping plugs' thread in this forum.. info and pics there.
Legendre — 17 years ago
Oh for cripes sake, I posted that to the wrong thread.
Legendre — 17 years ago
Graham,(Chiming in) here is the "LINK":http://performanceunlimited.com/documents/plugsidegapping.html that was posted on side gapping. There are photos.The outer electrode is adjusted so that the final gap is roughly the same; the author suggests an extra 0.010".Opening up the plug gap does increase the voltage of the spark, and (assuming current remains the same) the power. However
Legendre — 17 years ago
Brian,Since the Solex uses a cast-iron cylinder, I'd think that there would be standard oversizes for pistons & rings. But from what I've seen, that's not the case.Any idea why? Something about the cylinder design that prevents overboring?
Legendre — 17 years ago
Some interesting info in the 'Tuning' section at http://www.weronika.freeserve.co.ukBut realize that the only ways to increase the top speed of a Solex are to either change the diameter of the drive roller, or modify the engine to run higher than its intended 4000 RPM.
Legendre — 17 years ago
A good stock moped engine will have somewhere between 145-165psi of compression - in general. If you're down in the 115-120 range, the motor will probably be down on power. 100 or less, and it may not run at all.Perform the test with the throttle wide open, and crank it over several times until the gauge reading peaks out. Take three readings like this, then average them out.
Legendre — 17 years ago
nt
Legendre — 17 years ago
David,1) In this case, the drive ratio I'm referring to is the ratio between the circumferences of the front (variable) and rear (fixed) pulleys.As the variator operates, it changes the effective circumference of the front pulley. This causes the ratio between the two pulleys to change, much the same way that shifting a manual transmission changes the drive ratio from input shaft to output sh
Legendre — 17 years ago
Paul,50V does not refer to 50 volts.. not sure where you got that one. It means that the bike is a model 50, with a Variator (continuously variable transmission).Use regular unleaded gas, premixed with 2-stroke oil at a 40:1 ratio.You will find the manual in the 'Moped Repair' section at www.mopedriders.org.Have fun.
Legendre — 17 years ago
Maybe I can help you think about this a bit..First - since the final drive ratio (when the variator is fully closed) is fixed as a function of pulley diameters, changing the spring can only affect the RPM / load at which the variator operates. It will have no effect on top speed.Having the variator operate early (weaker spring) means that the engine sees a higher load sooner - meaning that on a st
Legendre — 17 years ago
Cyberian,I doubt that the little mageto on a moped would even be able to fire a surface-gap plug. And if it could, you'd probably end up damaging one or more of the coils.Typical plug gap on a ped is around 0.015".. what do you think the effective gap is on a surface plug? (I don't know, but it's clearly much larger)Aircraft magnetos are serious affairs, with much more power th
Legendre — 17 years ago
That's a good point, bret..Rob, if you have a variator, it's easy to tell. When you rev the bike up on the stand, the motor will pivot towards the rear of the bike, then back forwards as the engine slows.
Legendre — 17 years ago
bret,Afaik, none of the Travler models had a variator.. it was a low-end model, 20 or 25mph, with most of the traditionally chromed parts painted black. Adding a variator is a great suggestion.
Legendre — 17 years ago
I thought that NGK made the Iridium plugs.. they replaced the old V-type which had a gold-palladium electrode.NGK makes excellent plugs, and if they offer a premium / racing plug, it's probably worth the money. I doubt you'll see any real increase in HP, but the bike may start easier, and run a bit better under full load. Also, I think the fine-wire plugs (like the V type) are less prone
Legendre — 17 years ago
I don't think there is.. I got the sense that he is trying to adapt one.Airsal makes a 70cc for it, but never heard of a Pollini kit.
Legendre — 17 years ago
Another reason that weight affects top speed, is due to flexing of the tire carcass. The more weight on the tire, the more the carcass flexes. This results in your engine's power being lost as heat, as the tire is deformed.There are also additional frictional losses in the drivetrain, as the engine tries to accelerate a heavier bike.Racing vehicles are kept light to reduce inertia (the tenden
Legendre — 17 years ago
If the pipe broke near the head, it's pretty safe to say it was due to incorrect mounting. Could be a design issue as well, but we don't hear about a lot of cracked pipes.I'd review your mounting arrangements before spending any more money on a new pipe. And personally, I'd have the old one welded.
Legendre — 17 years ago
All cutting/drilling will do is make it louder, and more than likely it will run worse - not better. Just wait till you get the new pipe..Patience is a virtue. Good things come to those who wait.
Legendre — 17 years ago
If your bike is already doing almost 40 (which I find hard to believe, if it's stock) then you are already at the upper limit of what the chassis, tires, brakes and suspension are designed for. I'd look to upgrade or at least optimize those areas before adding any more power.
Legendre — 17 years ago
Should be a 1-speed. The earlier MBK Sebring had a 2-speed Franco Morini MO2 engine, but as far as I know, the Motomarina were all 1-speed.
Legendre — 17 years ago
The K&N oil is a fairly special forumulation. It is compounded specifically for the K&N mesh-type filter, as opposed to the UNI filter oil, which is intended for use with the UNI filters made from open-cell foam.Been a while, but I always used the K&N oil on their filters.On the bright side, you really do not have to clean & re-oil them as often as you might expect. They actually f
Legendre — 17 years ago
Kevin,I'm looking for MO2 upgrade parts. I'm told that they exist, but it's starting to seem like that is not the case.I'm also curious to find out if the MO1 and MO2 top-ends will interchange.
Legendre — 17 years ago
Jeff,It will not work the way it is. - you need to correct the interference, no matter how slight. Sounds like you need to bore out the mouth of the crankcase, if that's where it's striking.
Legendre — 17 years ago
_You do however reduce your displacement slightly._Actually, not true. Displacement is a function of bore & stroke, and is not related to combustion chamber volume. This is why the term 'displacement' is used, as opposed to 'volume'.But it is a very common misconception.
Legendre — 17 years ago
Fuels with higher octane numbers burn more slowly, and with more contol than lower octane fuels. And as far as I know, both 85 and 100 octane gas (I'm talking straight petrol here, not 10-15% alcohol) have the same (or very close) energy density - neither fuel has more 'power' than the other.The reason that you might get more power from a 100 octane fuel, is that most of the high-t
Legendre — 17 years ago
It could make a very small difference in top speed. The kevlar belts are not only tougher, but they have much less tendency to stretch.The constant stretching and relaxing of the belt, as it runs over the pulleys wastes some of your power as heat. Not much, but some.So, I guess the answer is a "yes, with a but".
Legendre — 17 years ago
From my observations, Chris can be a bit difficult to get ahold of. He's always a great businessperson to deal with, I just suspect that he's a busy guy with a lot going on.What address were you using? I always use chris@mopedwarehouse.com, if I need to get ahold of him. Takes a while sometimes, but he's always got the good info when he replies.Good luck!--MA IRC Chat is online, an
Legendre — 17 years ago
Um, yeah.. as I said in your other thread, you are gaming the system - and if you get caught, they will not be pleased with you.I'm going to try a different approach. When I go to get a title for my MBK Sebring (top tank), I'm going to try and register it as a motorcycle. I'll probably have to rig up some turn signals, but so be it.I've read the legal def. of a motorcycle in my
Legendre — 17 years ago
Rob,Just curious, what year is your bike? Every Traveler I've seen in photos or in person was a 1980, and I'm starting to think it's a one-year only bike.. at least for the US.