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Post by zambia on Apr 9, 2015 17:57:12 GMT -5
My 2ยข is something is up with carbs. Once it switches circuits, the fuel flow might be restricted - stabbing the choke won't add much fuel if the throttle is wide open so it could still be running lean if the fuel flow is restricted. If you give it a little choke from take off and just keep it there as you roll on past half throttle, that should clear up the rich/lean question.
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Post by kawonda750 on Apr 9, 2015 18:41:34 GMT -5
since the wrap coming off the baffles made a big difference, I am going to say that i had a rich situation. Restricted exhaust causing an over abundance of fuel. I will replace the larger mains with the originals and see what happens. i must say that carb work is so much more a PITA with these carb covers.
when I took the baffles out originally, i thought that no baffle would prove that plugged baffles were not the problem. when I removed the wrap on the baffles, i had to scrape the glass off with a knife then burn the baffle holes with a torch and wire brush them to clear them. This made a huge difference. With the exhaust flowing freely, I guess the fuel has to come back to efficiency by going back to stock mains.
BTW, thanks to LC for the numerous texts and the diagnosis. Doctor of Tripleosis.
I pray this works because the buyer is supposed to send the $ tomorrow. I will not send it out not working.
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Post by kawonda750 on Apr 9, 2015 18:46:55 GMT -5
Nonetheless, it has been an interesting study. I hope to be able to report that all is well tomorrow. Well, work sometimes gets in the way of really important things.
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Post by Walms on Apr 10, 2015 6:21:32 GMT -5
Dave, you said you cleaned the baffles back on page 1 with no result? From what I see so far, you said a marginal improvement with a different gas cap. Did I also read it correctly that the stock main is 160?
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Post by kawonda750 on Apr 10, 2015 8:45:56 GMT -5
I mis read. stock mains are 97.5 which it had. i put in 100's because that was what I had here.
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Post by Walms on Apr 10, 2015 8:49:44 GMT -5
Ok, have you ever tried the bike without the air cleaner in place? This will definitely lean things out a bit for a quick test (if you are in the mindset that it is a rich condition.)
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A7 choking
Apr 10, 2015 10:28:43 GMT -5
via mobile
Post by lc on Apr 10, 2015 10:28:43 GMT -5
There is no provision for wrapping either the A7's muffler baffles nor the 69-71 H1s. These baffles rely only on their various holes/slots/ gas passages etc to silence the exhaust.
If wrap is applied to these early type baffles the exhaust gas passages will be blocked,hence effectively clogging the mufflers.
Dave's A7 baffles were incorrectly wrapped by a previous owner.
Even though Dave reported he cleaned the baffles (out side of the previously installed wrap) the baffles remained blocked as long as the wrap was present.
Removal of the offending wrap appears to have mostly corrected the issue.
The bike should now only require final small jetting changes to optimise it's performance.
J
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Post by 42sixHemi on Apr 10, 2015 10:51:56 GMT -5
Fiche show Mains for the A7/A7ss @ 190's as STD from the Factory Part # 92063-021
Andy
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Post by 42sixHemi on Apr 10, 2015 10:53:04 GMT -5
And as high #210 for an option
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Post by autofobe on Apr 10, 2015 11:12:37 GMT -5
Ya,I think they used the round jets in those.I believe the volume is tested both ways producing a jet size ruffly twice what the hex jets.Although the threads are different,lots of people jam in hex jets.
Brad
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Post by kawonda750 on Apr 10, 2015 12:07:07 GMT -5
Parts manual says 160A. Shop manual says 97.5 I will put the 97.5's back and see if it is even better.
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Post by daffey1 on Apr 10, 2015 12:09:11 GMT -5
Ya,I think they used the round jets in those.I believe the volume is tested both ways producing a jet size ruffly twice what the hex jets.Although the threads are different,lots of people jam in hex jets. Brad WTF ? Why? Unless your stuck in the middle of the woods and the wolves are circling, why wouldn't just use the proper fitting/size jet?
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Post by Walms on Apr 10, 2015 12:13:49 GMT -5
Brute force and ignorance is probably the best reason...
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Post by drewski on Apr 10, 2015 14:12:03 GMT -5
There is no provision for wrapping either the A7's muffler baffles nor the 69-71 H1s. These baffles rely only on their various holes/slots/ gas passages etc to silence the exhaust. I wondered about the wrap on those baffles. Good pick-up LC!
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Post by autofobe on Apr 10, 2015 14:30:20 GMT -5
Ya,On the chart it shows 140 for the A1.That was probably a round jet.The A7 used 97.5 which was hex.
Hex jets were plentiful & the threads are very close to the round jets.To the rookie they would seem to fit.
Brad
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