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Join Date: Nov 2007
Location: Chandler, Arizona
The EVAP system will seriously interfere with starting if you ever fill the tank over 3/4 full. Gas gets sucked into the charcoal canister and causes a rich starting system. When I bought my first new VN750, and had starting problems, the dealer told me not to fill the tank over 3/4 full. Total BS. The next day I removed the EVAP system, filled the tank all the way up, and never had any more problems. The PAIR system is another piece of EPA GARBAGE. It will cause backfiring and exhaust overheating, plus it seriously clutters up the bike. When I finished removing the EVAP and PAIR systems, I literally had a 5 gallon bucket full of EPA GARBAGE. I also had a much better running and much cleaner looking bike. And I kept my stock intake system, with the airbox and air filters.
Aside from all that EPA CRAP, you need clean properly gapped spark plugs and a nice strong battery. The VN750 has a weak ignition system, and it needs all the help it can get. I wish it were possible to install hotter coils to get a stronger spark.
If you have a carbureted bike, it is ALWAYS better to get rid of any emissions garbage it may have on it. That's my opinion, but I'm sticking to it.
I am a motorcyclist, NOT a biker.
1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike
Last edited by VN750Rider/Jerry; 02-21-2020 at 07:17 AM.