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Engine & Transmission / Re: crankshaft/cases/bearing inserts
« Last post by oly507 on October 16, 2017, 02:13:30 PM »
Guy, thank you very much.  Rich
   The only dumb questions are the ones you don't ask , that get you deeper in trouble for not knowing the answer !
Well that confirms it, im an idiot. Sorry for the dumb question
Dailydose1 ,
 I am looking at a wiring diagram for 74/75 models . The blue/black wire is coded LB . Shown at " right handle switch/light" .
                                                                        Dave .
I have a service manual but my wiring diagram, ill have to look again, does not mention any blue/black wires at all. Its not even on yhe color legend which is why i was so confused. But ill look again and gwt back to you
Dailydose1 ,
 Blue/black goes to the headlight dimmer switch (left grip) .
 Is the black wire you mention heavy gauge ? If so , it goes to the starter solenoid . It may be to the neutral switch if it's a small one . that would be near the alternator wiring .
 Do you have a service manual ? Sounds like you need one !
                                                                                               Dave .
Engine & Transmission / Re: crankshaft/cases/bearing inserts
« Last post by guylr on October 15, 2017, 03:32:30 AM »
I apologize for confusing you. I'm left handed! The RIGHT most Web has the machined flat with 22 for the big ends and the 3rd and 4th crank wheels, again on the right end, have the main journal sizes stamped on them (121)

Your rods are both stamped #2  so 2-2=0 for all of your rod bearings. 371-11656-03-00

If you are sure the you were looking at the underside of the top front engine mount bosses on the cases and there was only a 4 then I'm going to assume that all three main case journal sizes are #4 not 1974.

So main bearings are:
Left 4 - 1 = 3      341-11416-30-00
Center 4 - 2 = 2  341-11416-20-00
Right 4 - 1 = 3     341-11416-30-00

Hi guys!

I rewired my entire bike today! What a learning experience it has been but a blast none the less! I keyed on the power and got a small electrical fire out of the blue/black wire on the RH controls which I thought was ground and had wired as so? Am i doing something wrong there?

On another note I have a black wire coming out of the starter hole, is that ground? Same with by where the alternator wires come out?
Engine & Transmission / Re: crankshaft/cases/bearing inserts
« Last post by oly507 on October 14, 2017, 06:36:34 PM »
Thank you Guy for your reply.  I have never been accused of being the sharpest tack in the box and this insert problem proves it.  First, I found the 22 STAMPED on the right most(# 4) crankshaft web.  I found a "12" stamped on web # 3, and a "1" on web # 4.  Using the formulas you gave me I came up with the following.
  Main bearings:  crankcase #4 - crankshaft #(1) = bearing #3   crankcase #(5) - crankshaft # (2) = bearing # 3   crankcase #6 - crankshaft # 1 = bearing # 5
  Rod bearings:  rod1 #(2) - crank big end # 2 = bearing # 0  rod2 #(2) - crank big end # 4 = bearing #(-2)
Obviously there are some problems with my numbers.  I did find just the # 4 stamped under the motor mount, so I assume that means 1974.  Looking at the Yamaha fiche the rod inserts start with "plane brng. con rod (371-11656-13-00)" and go to (371-11656-53-00) in increments of 10.  The crankshaft inserts start with (341-11416-00-00) and go to (341-11416-40-00) in increments of 10.  When I look at the crank I see 5 places where a insert can go.  Surfaces 1,3,5 are for the mains and surfaces 2,4 are for the rods.  In the Yamaha shop manual the crankcase surfaces where the inserts go are numbered 4,5,6 going left to right.  What am I doing wrong.

Electrical / Re: No Charge! ( I believe a bad Field Coil )
« Last post by guylr on October 11, 2017, 09:34:47 PM »
Before you give up on the old field coil, did you pull the cover and check the lead wires all along their length?  A cut wire outside the coil is not uncommon when people change their sprockets.

The older coils will fit your E model.

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