| Author |
Message |
    
Allan Harris
New member
Username: another_allan
Post Number: 1
Registered: 05-2015
| | Posted on Wednesday, May 27, 2015 - 08:28 pm: | 
|
G'day,
I have finished rebuilding a B-C TXRR and I can get it to fire. However after a few cycles it gives an almighty backfire and comes to a halt. I see no problem with the timing, the plugs and gaps (plugs and points). I am assuming I have a carby tuning problem and I have no publication to tell me how to preset the jet and the aspirator. I have read that the aspirator is set so that you see four threads of the adjusting screw.
Anything else that I am overlooking ?
TIA,
Allan |
Todd Vidgen
Senior Member
Username: todd_vidgen
Post Number: 260
Registered: 03-2008
| | Posted on Wednesday, May 27, 2015 - 10:00 pm: |
|
Have you put the pistons in the right way.That will do it.
Todd |
David Myers
Senior Member
Username: dave_myers
Post Number: 134
Registered: 11-2006
| | Posted on Wednesday, May 27, 2015 - 11:17 pm: |
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Hi Allan, The mixture needle needs to be about 1 - 1 1/4 turns out. The air bleed screw is right at 4 turns. Sounds like you may have the pistons in back to front. The High part of the crown goes to the Transfer port side. Th manual is not very clear on this Being in the wrong way around it does not allow transfer of fuel to the top of the piston and so will backfire and stop. Hope this helps... Cheers, Dave |
David Myers
Senior Member
Username: dave_myers
Post Number: 135
Registered: 11-2006
| | Posted on Wednesday, May 27, 2015 - 11:30 pm: |
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G'Day Todd..
Same as I posted about an hour ago and the bloody thing told me I had the wrong user name and password. Got that sorted and it took another 1/2 hour yo get the new code.. All well now.. Soon as I read Allan's post I knew it sounded like screwed pistons.. How you going? Keeping well? Still plodding along here but slowed quite a bit. (don't get old mate).. Catch up later.. Dave.. |
Todd Vidgen
Senior Member
Username: todd_vidgen
Post Number: 261
Registered: 03-2008
| | Posted on Wednesday, May 27, 2015 - 11:49 pm: |
|
Too late ,aches and pains in shoulders when it gets cold.(too many stubborn hard too start engines).
Be good or dont get caught.
Cheers Todd |
Allan Harris
New member
Username: another_allan
Post Number: 2
Registered: 05-2015
| | Posted on Thursday, May 28, 2015 - 01:22 am: |
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Pistons OK. What next group? |
Stephen McFarlane
New member
Username: ducati
Post Number: 3
Registered: 04-2011
| | Posted on Thursday, May 28, 2015 - 02:50 am: |
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Sucking air through worn main bearings? I had this problem until I renewed the white metal. |
Allan Harris
New member
Username: another_allan
Post Number: 3
Registered: 05-2015
| | Posted on Thursday, May 28, 2015 - 03:50 am: |
|
I hope you're wrong Stephen - I haven't got much else on though. 
Ta, Allan |
David Myers
Senior Member
Username: dave_myers
Post Number: 136
Registered: 11-2006
| | Posted on Thursday, May 28, 2015 - 04:54 am: |
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Where are you located Allan? |
Allan Harris
Member
Username: another_allan
Post Number: 4
Registered: 05-2015
| | Posted on Thursday, May 28, 2015 - 05:29 am: |
|
Northern Rivers, NSW Dave.
PM me if you want a more accurate location.
Allan |
Allan Harris
Member
Username: another_allan
Post Number: 5
Registered: 05-2015
| | Posted on Sunday, July 05, 2015 - 01:29 am: |
|
Looks like renewing the main oil gasket and adjusting the fine gaskets (there were three on top of the main one) has done the trick. A short (not so good) video for interested people.
https://youtu.be/XoA0-uOLt0E
Cheers Al |
