Oneorangedog
New Member
So, I've been building this bike over the last 2 years, and its finished, and has been running ok - up until this weekend!
Now it barely fires at all, and it seems that the starter is just spinning... but it is definitely engaging the alternator gear and turning the engine over - just not every time.
Note: I have recently fitted the new[improved] bendix idler gear and starter clutch [OEM parts], so the infamous metal-on-metal grinding idler gear has stopped. It worked fine for a week or so after that.
Here is a vid showing the alternator spinning with the starter:
https://www.dropbox.com/s/uoq0z3sw36ua98p/VID_20190515_203815017_HDR.mp4?dl=0
I'm sure its not a fuel problem as I have stripped both carbs fully. I have also tried spraying carb cleaner directly to see it starts to fire - nothing.
I have a programmable ignitech CDi unit, so i can see when the 2 pick-up light up - they do light-up occasionally, and the engine tries to fire, but thats as far as it gets.
Both plugs are new, they seem to be sparking well.
Some background:
Yamaha TR1 1983 cafe styled build [it will be at the Bike Shed show next week!]
All new wiring, Li battery, M-unit, LED lighting etc
Loads of hand-made parts
2 into 1 SS exhaust
2 x Mikuni VM38's
All earths are new/good, I've even added a temporary extra earth from starter to battery which did seem to make the motor spin better
Now it barely fires at all, and it seems that the starter is just spinning... but it is definitely engaging the alternator gear and turning the engine over - just not every time.
Note: I have recently fitted the new[improved] bendix idler gear and starter clutch [OEM parts], so the infamous metal-on-metal grinding idler gear has stopped. It worked fine for a week or so after that.
Here is a vid showing the alternator spinning with the starter:
https://www.dropbox.com/s/uoq0z3sw36ua98p/VID_20190515_203815017_HDR.mp4?dl=0
I'm sure its not a fuel problem as I have stripped both carbs fully. I have also tried spraying carb cleaner directly to see it starts to fire - nothing.
I have a programmable ignitech CDi unit, so i can see when the 2 pick-up light up - they do light-up occasionally, and the engine tries to fire, but thats as far as it gets.
Both plugs are new, they seem to be sparking well.
Some background:
Yamaha TR1 1983 cafe styled build [it will be at the Bike Shed show next week!]
All new wiring, Li battery, M-unit, LED lighting etc
Loads of hand-made parts
2 into 1 SS exhaust
2 x Mikuni VM38's
All earths are new/good, I've even added a temporary extra earth from starter to battery which did seem to make the motor spin better