picked up a 99 vn750 and she fires right up. has vance and hines pipes on it. Noticed at around 1000rpm and less(and at idle) doesn't sound like the rear cylinder fires all the way and is sluggish to get going. After 1000-1200rpm she take off and can hear the rear cylinder/exhaust really kick in and louder. Now at times, not always, when I go to start it seems as though the motors binding like the starter is stuck. Hit the button a few times and it'll crank over and start.
Assuming of course the carbs need cleaned, tried the seafoam and no luck. Will the carbs also need to be rejetted with the v+h exhaust?

well, "1000 rpm and less and at idle" is a problem. idle spec is 1100 rpm.

I would do the simplest (and cheapest) first, that is set the idle at 1100-1200 when fully warmed up. see if that clears up the rear jug.

when you say it seems like the motor is stuck when starting, is the starter motor engaging, but not able to spin engine thru a full cycle? (such as if you had a cylinder filled with gas and it was hydraulic locking). that is a common symptom when using a wet cell battery, or problems with battery cables/connections (there is a ground near the battery box on frame thats notorious for bad connection)

You may have to just pull the carbs and clean the jets. Your pilot might be cruddy

Shut off the petcock with the engine running and see if it smooths out. If the float is stuck you can be flooding the rear cylinder and shutting off the gas will allow the float bowl to empty out. Your should be able to run it for a minute or 2 before it runs out of gas.

here's something you can try https://www.vn750.com/forum/22-carbs-...arb-clean.html oh,by the way, you wouldn't happen to be on the cupboards forum under the same name?

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thanks for the response. I believe that may be the issue, hydroli locking. At leat a mechanic I was talking to suspects.

edit gunboards forum

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