I have a Yamaha DT125R 2003 and am looking to increase the ride height. On either side of the back wheel there is a cog with numbers on, I presume if I loosen the bolt and adjust this it will change the angle of the arm and inscrease the height. Can someone confirm this for me?? Thanks

Single speed bikes are often known as Fixed gear or fixie bikes.
But Most people don't know the difference between a fixie and a single speed bike.
It's all in the hub
Mechanically, the difference is so small that you might not spot it even when you are looking for it. It all comes down to the rear hub and how the single cog is connected to the rest of the drivetrain. Single speeds are fitted with a freewheel cog that rotates freely one way but locks up the other. This means that the cog will turn the rear wheel when you pump those pedals, but then freewheel when the rear wheel starts turning faster than the cog - much like a geared bike.

When it comes to Fixies, it has no mechanism on the hub. The cog is fixed into the hub. If the rear wheel turns, the cog turns, and if the cog turns, the pedals turn with that. I admit the difference is not so small, but one that has a huge effect on how a bike rides and requires some consideration before you decide on a bike.
If you want to know more about Single speed and fixed gear bike
Have look on this
Gear bike review Blog.


Best Fixed Gear Bikes In 2018 Enjoy Your Ride On Cool Fixie Bikes

Check the steering rack cogs r
Are not missing each other as you turn the wheels left if the teeth gap increases as the wheels turn the rack is worn and will need adjusting so the teeth meat better or the rack will need to be replaced this . Part can be quite expensive I had a countax ride on same problem would not turn to the left easily or the steering wheel would just spin. Around but the front wheels did not move until you pushed them by hand 're engaging the cogs on the rack it was nearly £ 596+ vat just the parts needed to repair it

Te only way to re insert it(the bar in the cogs) is to slightly force the drawer glides apart and reinsert it.

Well, you're looking at. Shift it each way and find out. Two separate controls suggests binary opposing function.

You'll probably find it here. Adjustments will be necessary at some point.

http://www.parktool.com/blog/repair-help/shift-levers-shifters

I presume u mean the thread does not protrude much (if at all) past the nut
How does the nut lock?
split-pin / R clip or cir-clip - it must come through much further
tab / spring-washer - it should be at least flush (level) with the nut
or if it is a Nylock / Aircraft-style locking nut - the spindle should protrude at least 5mm to allow for the thread lead-in

Ride safe
Bike-Doc
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3 Pints is average but you can adjust it to your riding style and weight. Stock oil height is around 130mm from top but you could set it around the 110 to 100 range for increased bottoming if you do a lot of big jumps ect.. 5w oil is the usual weight but fork oil goes up to 20w.
-John

you have increased the width of the tire only 5mm on the sides, all you need to do is to trim the mud guard down just enough to clear the tire and still work as a mud guard. if you were to install a longer shock you would change the geomerty of the machine making it harder to sit (higher) on and ride in the leaned over position seat no longer flat but leaning down hill to forks