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+1 for the Twinmax, BUT -- as with many things, you must follow the directions exactly, make sure that you re-set the sensitivity knob properly, don't bang the needle off the stops, and keep testing the 9V battery before use, as it has to be at least 8.5V to work properly. . .etc., etc. This device has detractors, but at least SOME of these haters aren't following directions, I'm betting.
Article: Throttle Synching for Dummies over on ADVRider site. . .priceless.
Opinions differ on the efficacy of doing an "exact" synch while riding the bike at highway speeds -- something that (I believe) is only possible by using the TwinMax, but "some say" that it allows for a more precise adjustment. . .and it IS easy to do.
MANY great synch tools out there now, so read and research before buying -- they all seem to cost about the same.
Have fun.
Walking Eagle
HW, and others. . .
OK, one or more of you guys have to come explain to SWMBO why it is that I now have to have ANOTHER strange device to do strange esoteric things, when I already have a set of vacuum gauges AND a TwinMax, both of which work just fine??? Jeez! I just bought a new torque wrench, and I already had two that work just fine. . .
In fact, can you guys come explain to ME why it is that an itch has been started that can only be scratched with some, uh, scratch for a Harmonizer????
You people are SICK!!!!!.
HW, and others. . .
OK, one or more of you guys have to come explain to SWMBO why it is that I now have to have ANOTHER strange device to do strange esoteric things, when I already have a set of vacuum gauges AND a TwinMax, both of which work just fine??? Jeez! I just bought a new torque wrench, and I already had two that work just fine. . .
In fact, can you guys come explain to ME why it is that an itch has been started that can only be scratched with some, uh, scratch for a Harmonizer????
You people are SICK!!!!! (Seriously, THANKS for the details on the Harmonizer, which sounds like a superior product to the rest of the offerings. I'm sold.)
I'm never reading this site again. . .
Walking Eagle
p.s. I'm going through a friend's '78R100RS (MS) - winter project. Since I know NOTHING about Airheads (yet) I've been spending time over there on that forum. THOSE guys really do need professional help, and I'm not talking about mechanically.
I made a simple magnahelic (sp?)gauge using cheap 1/4 inch vinyl tubing, some light weight oil and a yard stick. This is sometimes called a U-gauge. Bend the clear tubing into a U of equal lengths and zip-tie it to the yard stick. Fill the tubing with light weight oil, (colored oil is easier to see), until you have about a foot on each vertical rise of hose. You only need enough oil to see if you're pulling left or pulling right. DON"T use anything water based? If oil gets sucked into your engine, you get smoke. If water gets sucked into your engine, you get a big headache, depending on how much water was sucked in. First ADJUST THE VALVES AND ZERO THE THROTTLE POSITION SENSORS. Then, hang the magnahelic (sp?) gauge above the bike, and attach each end of the hose to the vacuum port on each cylinder (they're on the bottom where the rubber hose attaches). The 2 cylinder vacuums will then be pulling AGAINST each other. This is a really simple tool, but VERY accurate! Adjust the idle air screws in small increments on both sides, until the oil levels balance in the hose, you have a glass smooth idle (look in the mirrors for vibration), and are idling at around 1200 RPM. Next adjust ONLY the Right Side throttle cable so the oil levels balance in the hose at ~3500 RPM. Be careful not to over-heat your Oilhead! It's a tedious process of not-enough...oops, too-far, but when you're done your bike will run soooooo smooth. This simple tool will set you back less than 5 bucks and you'll be able to dial-in your Oilhead perfectly.
when you say "zero the TPS".... when do you put it back to .370?
That requires the right tools for any possible job.... At least that's the justification for my wife when she asks why I need another whatever it is. I don't try to justifiy it to myself.
OK, one or more of you guys have to come explain to SWMBO why it is that I now have to have ANOTHER strange device to do strange esoteric things,.....