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If your friend was already kind enough to give it to you why do we need to verify your fitment? I wouldn't consider it an upgrade. Your 125 shock is designed with a smaller shock shaft to help keep the weight down and make it more responsive to a lighter bike. As are the valve stacks and spring. Say you...

Sounds like a great plan. Let's just go back to the days where we had to send money order's, personal checks, or use COD. Stop acting like the .01%?? of un-truthful people using Paypal make it a bad process

But in the 450 class factory teams are allowed to have un-obtainable motor and suspension packages on a "level playing field??" Any decent mechanic can get a bike below the legal weight limit if the budget is available. But the small teams and privateers can't touch the resources factory teams have for motors and suspension. Let's be honest with ourselves...

Use a dremel tool with a soft bristled brush to clean the seat surface. This is the only decent method I have found to clean that tough to reach area. If that doesn't work, you can sometimes use an easy-out to pull it. Doesn't always work and there is a high chance of damaging the carb.

I think some of the problems in the future are going to be how well do the FI models age? It's just another layer of complexity/expense that we have never seen before. If you were serious about finding a used 250F, I would personally opt for an older model that still has a carb on it. Any year YZ250F with...

Despite what you might think, I would say this isn't a "common" problem. Yes, the YZ250 transmissions aren't the smoothest or most bulletproof of the bunch, but they are not weak to the point of what you are seeing. Are you sure you have all of the shims in the correct places? IMO, the fact that you have had this...

You might like a flywheel weight. If you are willing to sacrifice a little bit of top RPM, a flyweight will do exactly what you're looking for with the combo you already have on. You could also try dropping the rear sprocket 1 or 2 teeth.

Do you lubricate the bolts before applying the torque? Are you confident you are receiving the proper torque from your torque wrench? You can get false torques from dry, sticking bolts. I always like to ensure the threads are 100% and then apply a small amount of assembly grease to the bolts. Provides a very smooth and consistent feel. I...

Someone please correct me if i'm wrong...won't be the first or last time.... But I have heard before that if you are holding an AMA sanctioned MX race that is illegal to alter to the conditions of the course after the event has started. This includes grooming the track surface with discs, tillers, rakes, etc. As far as I knew...

Started riding around 5, doing mostly play riding. Raced locally pretty heavily @ district level from 2006 to 2008. Never got much better than B class. Quickly realized I enjoyed working on bikes more than racing. Spent a couple years working at a local dealership, focusing on MX bikes. Did a short stint in 2009 as a privateer mechanic and...

It isn't worth the cost if you are putting it in a stock motor. This is a trick done mostly in mod motors along with many other mods to reduce friction. I have always had really good luck with JE pistons.

What's your all time favorite tire combo?

They don't work as well as you think. The ideal solution is a hot wash tank, but they are usually large and exensive. I have good luck with a Harbor Freight sandblast cabinet using find walnut shell media. Followed by red and green scotch brite pads. Aluminum parts come out looking like new!

Get the jetting right for 93 and you'll be fine!

Seems too convenient given his withdrawal notice for the Aussie SX, followed later by a re-annoucement to confirm he was back in after getting beat up pretty hard by social media. I don't blame him though. With a guy like Stew that's so likely to crash his brains out and get hurt and the constant thoughts of near retirement in...

It's not hard to make a high HP, potential grenade motor. It's hard to make a high HP 250F motor that can last the riggers of pro MX. Look at the recent string of problems Pro Circuit has had with their motors. Years and years and rears of R&D and they still don't have a perfect solution. Gotta love 4...

Only a smart move if they were confident the riders could afford to maintain health insurance throughout their career. Definitely a risky move during that point in their careers.

Ethanol free 93 is plenty for a stock YZ250 motor. Very little difference between 100LL and 93 other than cost. If you want better fuel, do it right and use your choice of VP @ a 50/50 mix with 93.

Sounds like you could potentially have a slightly plugged up return passage. Usually too much oil gets trapped in that area and it has nowhere to go except out the breather tube. The other suggestion is to do an oil drain and change. Measure the fluid precisely. I've learned not to trust the oil fill indicators on the sight glass...

I've never had any problems with them. They are a good solution if you don't want to spend for a full blown Hinson setup.