Low Cost Front Fork mods – Yamaha Virago 250 – the stock forks may be better than you think
Here are some low cost front fork mods and maintenance that I did to my 2002 Yamaha Virago 250:
1) I changed fork oil and put in a heavier oil – it comes with 10w – but increasing it to 15w is a good idea. I used Rotella T 15-40. The forks hold 8.3 ounces (245.46 ml) each – when you put in this amount the oil level will be 4.7 inches (102 mm) from the top fully compressed without springs (the springs are removed before putting in the oil).
2) I overfilled fork oil by about one inch (25.4 mm). The oil level will be 3.7 inches (94 mm) from the top fully compressed without springs.
3) I added an additional spacer 1 1/16 inches wide x 1 5/8 inches long from home depot #12871-62497-1, which is a 5/8 inch PVC coupling 25¢ each. It is very tight to put in. It raised front end by maybe ½ inch (12.7 mm) or more.
4) I re-torqued all front fork mounting bolts. Some of the torque specs for the Virago 250 are listed below.
5) I added a fork brace. The front fork brace that I am using is a “universal” brace.
If you are buying a universal fork brace, you will need to take your lower fork measurements.
Below are the measurements from my bike.
2002 XV250 front forks measurement
187 mm top of lower fork where brace is to mounted – center to center.
133 mm top of lower fork where brace is to mounted – inside measurement.
54 mm top of lower fork where brace is to mounted – diameter.
aluminum “universal” forkbrace that I added to my Virago 250
Here are the measurements of the brace that I have: Fork case diameter is 60 mm. Clamp will fit a 60mm fork case (slider). (The lower tubes of the Virago 250 forks are 54 mm wide, so I had to add a 3 mm strip of thin metal so the clamp can be properly tightened. See the thin metal strips marked in green in the upper right of the picture.) Fork tube spacing is 184 to 185mm. The center-to-center distance between the fork cases is 125 to 127 mm. The clamp height is 22mm.
6) If you have removed your stock front fender, I would highly recommend that you re-install it. The stock front fender bracket is approximately 3mm steel and functions as a light-duty fork brace. The torque specification for the four 10mm front fender bolts is 14 ft lb. If you happen to have a extra front fender, you can add just the bracket part to your front fender to increase it’s performance as a fork brace (there is room enough to add two extra fender brackets to the front fender).
7) This is not a front fork item, but can affect handling in general and can cause front fork wag – I tightened the two allen bolts that secure the rear fender to the frame. The torque spec for the rear fender to frame allen bolts is 43 ft lbs (60 Nm).
8) This is not a front fork item, but can also affect handling in general and can cause front fork wag – I re-torqued the swing arm pivot bolt. The torque spec for the swing arm pivot bolt is 33 ft lbs (46 Nm).
- Torque Settings for Virago 250 (front forks):
- cap bolts on top of fork 17 ft lb (23 Nm)
- 10mm crown nuts at top of fork 22 ft lb (30 Nm)
- 10mm front fender bolts 14 ft lb (20 Nm)
- pinch bolts 14 ft lb (20 Nm)
- front axle 42 ft lb (58 Nm)
- Torque Settings for Virago 250 (rear):
- swing arm pivot 33 ft lbs (46 Nm)
- 10mm rear shock nuts 17 ft lbs (23 Nm)
- allen rear fender to frame bolts 43 ft lbs (60 Nm)
The heavier fork oil, 1 5/8” added spacers, and added fork brace reduced front end wag. Before I did this mod, my Virago 250 would sometimes develop front end wag – usually at high speed on windy bridges – keep in mind I have a Rifle Sport fairing, which probably added to or even caused the problem.
The Virago 250’s front forks are not high performance, but I think they are under-rated. They get some criticism, but I think the forks are fine for most people, especially if the combined weight of the riders is less than 250 pounds.
Virago 250 front springs have two stages – as forks are compressed the first 1.33 inches is softer (.80 kg) and the last 4.17 inches is harder (1.15kg). I weigh 210 pounds – .917 kg/mm is the optimum spring rate for my weight. So the first 1.33 inches of travel on the Virago 250 forks will always be too soft for me.
Since the Virago 250 front end dives when you apply the brakes hard, it is easy for someone to think the forks are too soft. But after the fork gets through the first stage, you still have over 4 inches of travel at a 44% higher spring rate.