I have a 2000 vulcan 800 classic with the scootworks belt drive. This was installed when I bought the bike. Recently put on new tires and there is no adjustment to loosen the tension of the belt. Shop that installed tires thought the belt was too tight. The belt tension is within scootworks spec but I here whining noises when decelerating and at certain speeds.

talk this over with a bike shop that sells rims and tires
there are several things to consider
ride characteristics change dramatically with different tire widths
legal ramifications of different front and rear tires
real advantages of wider tires as against "looks cool"
costs of new rim and wider tire against standard tires
modification plates for the wider tire
Talk it over with an accredited bike shop and find a person that has real experience and not just a salesman

Sit at a traffic light till the temp reaches about 220, it should start about then. My fan has come on 3 times in 8 years.

TO ALL VN1500 OWNERS....This once happen to me,
I went to the garage to start the bike "Nothing ""The first thing is the lights are bright but no turning over,Next you think the solenoid is kaput but the answer was very simple and the fix takes 30 seconds..
Do not take the bike to bits looking for other problems and look at the clutch leaver and you will see some wires going into a plastic shroud going into the switch in the clutch leaver, Make sure this has not popped out if its connection as it some times may do after a few years due to constant turning on the handlebars,
When this is not connected you will have a bike that will not fire up but comes alive and you will hear a clicking noise but this is from the engine carb area and every function of the bike will work but it will not turn over, Worth looking at and saves sixteen quid for a starter unit you never needed.

Has the bike been sitting??? If the carbs are gummed up from sitting and the float and or float needle get stuck in the "add fuel" position it could cause this

carb cleaning needed or could be vacuum issues

general rule of thumb is to go up about 10 jet sizes,unfortunately it is a bit of trial and error,and you may have to swap out diferrent sizes to get the bike running right,(jets are quite cheap though)but first step about 10 sizes from standard,your local dealer should be able to tell you what jets are in it and supply replacements,if you change to a hgh flow aftermarket air filter you may have to change jet sizes again as changing the filter may effect the mixture ratio in the carbs,,hope this helps

test or replace fan switch thermostat and flush cooling system

Sometimes after trying to start a bike with a weak battery the starter solenoid gets damaged,or loose connections develop on the solenoid due to heat.It should be next to the battery.

oil level is in window just under the cover on left side below the fill hole