royb
Junior Member
Posts: 85 
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Post by royb on Apr 3, 2018 14:09:23 GMT -5
In a previous thread I mentioned trying to start & set up a single cv carb, I eventually gave up on that & went for a new 40mm roundslide!
I can get it to start & run nicely (on choke only at the moment) & am playing with jetting/air screw........my problem is it will run for a few minutes then just stop!!
Also, I often get a horrible clunking noise sometimes on start up, sometimes when running or sometimes just before it stops!
Anyone know what that could be? I wondered if it was the balance chain (only done 9000 + miles), though engine is un-modded!
Putting in a balance chain adjuster looks a big job, plus where would I get one? (if it is that)
any suggestions would be welcome please
cheers
Roy
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Post by retromech on Apr 9, 2018 15:27:51 GMT -5
Hi Roy, I cannot remember if you have done any starter clutch related work, if you have please forgive my poor memory !!, the reason I ask this is my bike made some awful rattling noises at many different times ,
the majority turned out to be starter clutch related, hope this is of some help.
Regards Paul
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royb
Junior Member
Posts: 85
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Post by royb on Apr 10, 2018 7:14:59 GMT -5
Hey Paul, thanks for the reply.....I have replaced the starter clutch, it was from a low mileage GPZ305 (same part number but a better unit) which slotted straight on, however, I haven't discounted the fact it might be that.....will take the cover off & have another look (was hoping to avoid spending another £100 or so on this thing for Argo's unit!!)
cheers, Roy
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Post by retromech on Apr 10, 2018 14:28:54 GMT -5
Hi Roy, I was lucky with mine a friend had a complete brand new unused genuine Yamaha starter clutch kit and also the gear it runs on, I managed to buy this and several other new bits he had for £50, sadly he no longer has any TX750 bits left before any one asks, sorry they are all on my bike !!.
Regards Paul.
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royb
Junior Member
Posts: 85
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Post by royb on Nov 23, 2018 5:54:56 GMT -5
Well, decided to buy & fitted a starter clutch from Argo (thanks mate, nice unit & arrived quickly), much quieter & starts easily........however, still sometimes get this 'clunk' & she will just stop?  ? Very perplexing! |
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royb
Junior Member
Posts: 85
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Post by royb on Feb 26, 2019 12:18:32 GMT -5
Further to all the above, I can get her to run now (though still seems rich but still playing with the single carb....) but still have this 'clunking' (which sounds horrible) & if revs too low will just stop!! Re-checked valve clearances & cam chain tension ok.
Taken sump plate off to have a look, all appears ok (not sure what I was expecting), but does anyone know if the oil strainers should come out? They look like they're glued on.......
Any help gratefully received...........
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Post by scrambler on Feb 26, 2019 20:40:02 GMT -5
Hi,
The strainer should come off, probably someone before you put it back on using some sealant. I wouldn`t mess with that single carb, I`d just get two originals, they are cheap on ebay. I may have a pair somewhere too in pieces. That clanking is strange, the Argo set should be fine, pehaps it`s coming from somewhere else?
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royb
Junior Member
Posts: 85
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Post by royb on Mar 1, 2019 5:14:47 GMT -5
Sounds like it's coming from within the engine, which is why my first thought was balance chain/weights, small amount of movement, which I would expect.......clunking isn't constant, every few seconds when running, didn't want to strip the engine if I could help as there is good compression but may have to.........
Can't find carbs that easily in the UK, more common in the US but postage is really high! Thought I was getting somewhere with the single carb..........?
Roy
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Post by scrambler on Mar 1, 2019 16:18:47 GMT -5
Can you post a video about the sound when you have the chance?
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royb
Junior Member
Posts: 85
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Post by royb on Mar 2, 2019 5:05:26 GMT -5
will give it a go.......
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royb
Junior Member
Posts: 85
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Post by royb on Mar 24, 2019 12:37:18 GMT -5
When I initially fitted the single carb it had a #45 pilot jet in it, which I wondered would be a bit small as each original has a #45, so I went up to about #60 & back down again through various sizes as it was running rich.
What threw me was I got down to a #30 (where all the clunking was) & it still showed rich on the plugs?? So I sort of started again at #45 where it doesn't 'clunk' (wondered if it was 'pinking', something I haven't heard in years)& started playing with the airscrew.......it's still showing running rich on the plugs (& will just stop?), but the 'clunking' seems to have gone (thankfully), so still a case of playing with pilot/air screw.
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royb
Junior Member
Posts: 85
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Post by royb on Mar 24, 2019 12:46:56 GMT -5
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ellwinger
New Member
My motorcycle runs like a raped ape! It's fast!
Posts: 34
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Post by ellwinger on Apr 28, 2019 18:13:34 GMT -5
Hi, The strainer should come off, probably someone before you put it back on using some sealant. I wouldn`t mess with that single carb, I`d just get two originals, they are cheap on ebay. I may have a pair somewhere too in pieces. That clanking is strange, the Argo set should be fine, pehaps it`s coming from somewhere else? How did you contact argo? When I try it's all in Norwegian or some thing. |
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royb
Junior Member
Posts: 85
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Post by royb on May 4, 2019 5:39:44 GMT -5
Hi, I emailed him from the address on this site, he replied (in English) & arranged buying/delivery of the starter clutch, which was really quick.........
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? Very perplexing!
