My xvs 125 dragstar won't go over 30 mph - 2001 Yamaha XVS 125 Dragster

SOURCE: can't find oil filter on 2005 650 XVS Dragstar Classic?

on right crankcase by brake pedal you will find a round cover with 3 bolts in it, remove this and you will find some more bolts to remove the second casing that holds the oil filter, be careful not to over tighten the bolts when putting back, i did and stripped the thread, complete change takes about 15 mins

SOURCE: have problems starting yamaha xvs 1100 dragstar

Hi there fellow XVS dragstar owner!

I had the same problem before. It is usually caused by the wrong jets installed. have it Replaced with the standard jets that came with it... this will solve the problem on acceleration. Make sure the fuel and air mixture knob is set to 2.5 turns-out from full close. clean the spark plugs.. better, replace it with a new one to ensure clean burning of fuel. also, use unleaded gas. this burns better.

hope this helps
-levibit-

SOURCE: xvs 650 dragstar timing chain adjustment

That engine uses automatic cam chain adjusters. There is no manual over-ride or adjustment. If the cam chain is loose, you need to replace the adjuster at the least and possibly the cam chain and guides.

Testimonial: "What can I say...A very helpful reply , cheers"

SOURCE: 02 Yamaha xvs 650 dragstar classic that misfires when it warms up

First I would change all the spark plugs, and if that didn't make a difference then it sounds like the coil(s) are warming up and breaking down........when it starts to skip take a good pair of pliers with good rubber on them and pull each spark plug wire, when you get to the one that the running doesn't change then I would replace that particular coil

SOURCE: i HAVE A KNOCKING NOISE

That could be big end or main bearings. You won't know for sure until you take the crank out or remove the barrel and check for play in the bearings.