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post #1 of 6 (permalink) Old 02-03-2013, 07:46 PM Thread Starter
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86 excel issues

Ok, my 340 excel has no pep! It runs, has good power and idles fine but when you hit the throttle it takes a second to react. The clutches are clean and working good. However, there is a crack in the exhaust before the expansion chamber and its running fairly rich on oil. Could any of these be causing this?

'80 Yamaha 440 Exciter

'79 Yamaha 340 Enticer with
'78 txl 340 motor and a '80s
Indy skid.

'95 Polaris XCR 600

'86 Yamaha excel IIIU
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post #2 of 6 (permalink) Old 02-04-2013, 04:42 AM
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Fix the exhaust crack first.

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post #3 of 6 (permalink) Old 02-04-2013, 06:26 AM Thread Starter
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Re: 86 excel issues

Thanks for the reply. Ill have to see if I can patch it when I get home.

'80 Yamaha 440 Exciter

'79 Yamaha 340 Enticer with
'78 txl 340 motor and a '80s
Indy skid.

'95 Polaris XCR 600

'86 Yamaha excel IIIU
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post #4 of 6 (permalink) Old 02-04-2013, 07:01 PM
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Lotsa things! Yes fix the exh! Turn down the oil untill you use a qt of oil for every 12.5 gal of gas! then check that the motor is square to the driven! And then start with a new belt!
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post #5 of 6 (permalink) Old 02-04-2013, 07:53 PM Thread Starter
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Re: 86 excel issues

Thanks guys, it was the exhaust. I guess it was more than just a crack. I don't have a welder so I took a piece of sheet metal and four heavy duty pipe clamps and clamped it all together.

Eventually I'll get it welded but we just got 4 more inches of snow and we wanna ride

'80 Yamaha 440 Exciter

'79 Yamaha 340 Enticer with
'78 txl 340 motor and a '80s
Indy skid.

'95 Polaris XCR 600

'86 Yamaha excel IIIU
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post #6 of 6 (permalink) Old 02-04-2013, 07:54 PM Thread Starter
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Re: 86 excel issues

Here's what it looks like. It held up pretty good!
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File Type: jpg uploadfromtaptalk1360029264239.jpg (104.0 KB, 24 views)

'80 Yamaha 440 Exciter

'79 Yamaha 340 Enticer with
'78 txl 340 motor and a '80s
Indy skid.

'95 Polaris XCR 600

'86 Yamaha excel IIIU
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