Short handle bars on a Special clutch cable rerouting ideas.

gggGary

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This has worked for me and a few others. This route uses the stock long special cable.
Per toomanyxs1b's exhaustive cable testing; bends in the cable are your ENEMY. Note the caps, this is a big deal. One sharp bend can fuggle your clutch action. The Yamaha worm gear was never an elegant solution, add poor clutch cable routing and you will always be fighting your clutch. But get a smooth cable route, do some other maintenance 101 and she can be a pussy cat with light pull and clean action.

Yamaha changed cable routing several times through the years. There is no one correct cable route, changing bars often means changing the cable route to match them. My route includes "Almost" straightening the elbow. see here for one way to do that. I place the elbow in the vee of a piece of angle iron and use a piece of aluminum bar and hammer to do it, the trick is straighten, but not kink.

So here is one routing that works on a stock special with short bars. I'll start at the engine end.
I like the outside the carb and side cover (if you have one) route .
The elbow has been straightened quite a bit.
Depending on your tank it's crowded by the fuel line, really follow the pics for how it all lays out.
Cable goes UNDER the frame tube and on top of the engine on the RH side.
I twist the tach cable bracket a bit and run the clutch cable through it.
then inside the fork leg and up on the RH side of the iggy switch, crossing behind the switch and over to the the lever.
This seems fussy but smooth clutch action makes it worth the effort!


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I'll toss on clutch cable maintenance 101
LUBE the cable! Remove cable from lever and perch, use some electric tape, wind on the cable end to make a small funnel, add oil, work the cable up and down, repeat till the cable runs smooth and easy.
If you are starting with a cable that is really bound up, TOSS it and buy new. if there is rust down inside the cable, lube won't fix it. Trust me I have seen plenty of cables beyond hope and replaced them.
Straighten the elbow. Note the stock elbow has a thin black plastic liner tube in it with a small flange that keeps it in place, if the tube drops out of the elbow and is sitting down inside the engine cover you will always have hard clutch action!

Remove and lube the lever pivot bolt. Check that the hole in the lever is not worn out, this is pretty common, no one bothered to lube the pivot. The aluminum lever gets ground oval, that reduces how far the clutch moves and adds a bunch of effort to the pull.
Here's a detailed thread on that. with a fix. Note the o-ring that should be in there to keep the lube in!

search key words; route routing clutch bind hot adjust adjustment slack tight slip drag handlebar handle bar bars handlebars bend bent bends worm screw nut ball tight tank rust oil lube cable nylon rod seal
 
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Great write up Gary, but why not just call 650central.com and get a shortened cable with out the metal bend? Mine was like $10-15.00

Anyway, keep on doing what you do. You're a great asset to this page.
 
Ok...will adjust as I had my cable going between my carb filters and not over. 1st gear clutch in ... I should be able to roll this bike around the garage right. I suspect my clutch is not disengaging. Last step in the build so I'm a little anxious. Thank you all for the responses.
 
1st gear clutch in ... I should be able to roll this bike around the garage right. I suspect my clutch is not disengaging. Last step in the build so I'm a little anxious. Thank you all for the responses.

They will grudgingly roll forward and not want to go backward much if at all with the engine not running, in gear, clutch in. Specially with cold oil.
 
They will grudgingly roll forward and not want to go backward much if at all with the engine not running, in gear, clutch in. Specially with cold oil.

Even after fresh oil,new clutch plates,springs,650 central cable, new push rod and ball,and numerous adjustments, I learned to keep my clutch lever pulled in with a velcro strap in the garage.
 
Gary, your T.S. canceler can usually remain somewhat in it's original location if you just bend it's mounting tab up and place the unit on top of it instead of hanging below it .....

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Quote from Shade "Rerouted the clutch and throttle cables and it is a big difference. The clutch lever has never been this easy to operate, and the engine is idling smoothly without revving. For now....
Just went on a great little ride around town."
 
A bit of a long term test result. Madness; a 750 with an ippytatoo 8 plate conversion, Barnett HD springs, factory 2 piece rod, Motion Pro cable, clean cable routing, last lubed with oil/Tungsten Disulfide mix, short bars, reworked clutch lever, pivot bushing, and bolt. When leaving the Peoria TT we sat in sun, 85 plus, stop and go for at least 20 minutes.move 5' stop, wait 2 minutes repeat.
OK the meat, I was able to EASILY find neutral EVERY time! Come to a dead stop, click up from first, bink, neutral. This setup does not slip a bit under heavy acceleration even above 5K RPM. Motor does have remote filter and oil cooler, no overheating, idle stayed dead even at 1000RPM, no throttle nursing needed. (VM34's, Pamco with e-advance, Accel coils) It catches and fires first spin hot or cold.
My point? Oh yeah, with everything just right these do act exactly as a motorcycle should. 40 years on, that's a statement....
 
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A bit of a long term test result. Madness; a 750 with an ippytatoo 8 plate conversion, Barnett HD springs, factory 2 piece rod, Motion Pro cable, clean cable routing, last lubed with oil/Tungsten Disulfide mix, short bars, reworked clutch lever, pivot bushing, and bolt. When leaving the Peoria TT we sat in sun, 85 plus, stop and go for at least 20 minutes.move 5' stop, wait 2 minutes repeat.
OK the meat, I was able to EASILY find neutral EVERY time! come to a dead, stop click up from first, bink. neutral. This set up does not slip a bit under heavy acceleration even above 5K RPM. Motor does have remote filter and oil cooler, no overheating, idle stayed dead even at 1000RPM, no throttle nursing needed. (VM34's, Pamco with e-advance, Accel coils) It catches and fires first spin hot or cold.
My point? Oh yeah, with everything just right these do act exactly as a motorcycle should. 40 years on, that's a statement....
Time,money,effort,and diligence need to be put on that list also!
 
Alto's oil recommendation page http://www.altousa.com/page/oil-information

Oil Information


Motorcycle Oil

We recommend using Japanese Automotive Standards Organization approved motorcycle oil. JASO-MA and JASO-MA2 approved oils are designed for single unit engines where the wet clutch, gearbox, and engine used the same oil. Do not use automotive oil, it has too many friction modifiers and can cause clutch slippage, and gear box pitting. Reference your service manual, it will provide change schedules, viscosity, and the correct amount of oil to use. (On the back of the oil container there will be a JASO box with individual certification number)

Automatic Transmission Fluid can be used with bikes that use separate oils for the engine, clutch and gearbox. Alto clutches will operate properly with any of the ATF fluids on the market. (Ford “Type F” fluid will give a more positive clutch engagement, and is more suitable for competition riding.)

Worn or damaged clutch components will also affect clutch performance, thoroughly inspect the clutch assembly.

Alto motorcycle clutches can be used in a “Wet or Dry” application. For wet applications soak clutches for 10 to 15 minutes before installation. For moist application soak clutches for 10 to 15 minutes, wipe them off with lint free cloth before installation. For dry applications install right out of the box.
End blurb
I did a dip and smear oil on plates assembly. Last 2 fills have been Valvoline VR1 2050 non synthetic. About 4.65 a quart at Farm and Fleet. I'm using about a quart per 1,000 miles, have some cylinder scuffing low on the LH jug (borescope inspection). May be the result of a main jet that came loose while doing jetting changes. :redface:
Compression 175/195 and holding.
 
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Three years on, Madness motor's still running strong with about zero maint. Cold idle's gotten a bit finicky this year time to give it a lick n a promise I guess.
Clutch still the bomb. ( I have stock on ippy tattoo 8 plate conversions)............
 
Got the fish scale out and found little difference between an early stock clutch and madness with an 8 plate conversion, both about 18 lbs. By comparison the BMW hydraulic clutch R motor (single plate dry clutch) came in at about 12 lbs.

Cable routing; I have the rear of the tank lifted a bit so you can see routing under it. Cable goes tween speedo and handlebars then down low under tank mount on RH side, held loosely by a cable tie, crosses UNDER the frame back bone to the clutch cover, IIRC the elbow on the motion pro cable has less bend than the stock cable.
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My cable luber, a cheap translucent plastic bottle, with 2 stroke oil and DS2 WS2 powder, I have a large machine nut in the bottle to stir up the WS2 powder which settles when the bottle sits 'tween uses.
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No deep insight on the 2 stroke lube, I got a case of it with a bike that came and went so I use it for general lubrication.,
 
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FWIW, if you like the Motion Pro replacement clutch cable, it is only available in the longer Special version. The shorter OEM cable found on the standard bikes costs about $40.
 
My cable runs about the same as yours along the RHS of the frame. My ignition switch housing gets in the way of the cable too even if I shortened it? When first installed, the cable was routed between the fork tubes and that made a nasty bend and super hard clutch pull. Gonna research the WS2.


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Quick search found this. Is WS2 = DS2? How much powder do you add to the oil? What oil did you use? Would graphite powder work the same - it’s more readily available.

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