my starter thread

bimbo

bimbo

Hero member
I have read lots of starter threads here but I wanted my own, so there  :D

I noticed over the past week that the starter (SF2) has been slow to kick in when I press my magic button, then last Sunday I stalled at a set of traffic lights 50 yards from where we had set off from and it didn't want to go at all, nothing, nada. bumped it and she started right off.

So far I have done the following.

Stripped the motor out and cleaned allround, bushes are nearly new, resolderd the connection to the second bush, gently cleaned the copper stripy bit that the bushes run on with 800 W/Dry.

remounted it but didn't connect the starter clutch, still nothing apart from getting the lead from the battery to the relay hot and even the battery to frame earth lead hot.

today I stripped the motor out again and stuck it in a vice at work and put a starter pack across it, at first it didn't want to know but a second go and WHOOO off it went, all good I thought.

got an extra long earth lead on the way home and connected it direct from the starter mount bolt to the battery but when I tried it on the bike still didn't want to know ... Grrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

changed the solenoid for a spare, no help

tried direct from the battery... nothing but a BIG spark

Double triple checked that all the connections are clean.

am I missing something.
 
Sounds like a dead short at the starter motor. Take it off and start again, check all isolators are there 
                                                                                       

                                                                    Dave
 
Thanks for that, I will take it back off before I go to work, will give me something to do instead of playing cards and looking at the forum.

Will keep that in mind Phil, I thought I might have to have it rewound.
 
I'm never sure about this electrickery but I would think that I shouldnt have continuity from the rear pos bolt connection to the body of the motor? but I sure do  :o
 
bimbo said:
I'm never sure about this electrickery but I would think that I shouldnt have continuity from the rear pos bolt connection to the body of the motor? but I sure do  :o
Click to expand...

Indeed - you've found your problem!  As Dave says, check the connecting stud's insulating washers / post are correctly assembled and intact and that you haven't inadvertantly bridged the stud to earth with a large / deformed washer or cable lug
 
Been through all the above, replaced the little tube of bakerlight as it had a big V missing and could see where it had arced. It is all okay until the earth bush is dropped down then I'm getting continuity from the  post to the body.

Am I missing something? If there should be no resistance between the copper pads then with both bushes in contact, there should be a circuit between the body earth and the positive post. ???

Have a nice weekend everyone, will get back to this on Monday.
 
I think the clue here is your use of the word 'continuity'.  There will be an electrical path giving continuity between the starter lead post (+) and ground/earth, otherwise electric current can't flow to whizz the motor round.  The big question is how much resistance there is.  It will be low - I measured 0.3ohm - but it shouldn't be zero!
 
Thanks Brad, I was just using the bit that goes bleep  :D tested and it was around 0.5 but we now have a wizzy wirry starter, all I need to do now is rebuild the clutch with my new springs and rollers "thanks Keith"  8)
 
Does anyone have a tip for a good way to get the starter sprocket on all the way, it doesn't seem to want to go on far enough to get the circlip into the groove :( sure I had this prob before but it has been a Long time....
 
Ok, after finally getting it all back in, circlip on and all. presses magic button and NOTHING Grrrrrrrrr expletive expletive Grrr..

this starter had been in and out today more than John Holmes and this last time I forgot the lead from the solenoid *blush*

Woooo Hoooo she is good to go again, well as soon as a new belt turns up tomorrow
 
Thank you Cam, thats just the excuse I needed  :-*

its the zircon encusted belt that makes my Dyna-mo Hummmmmmmmmmm 8)
 
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