Tuesday, April 12, 2011

Yamaha WR250F WR450 suspension lowering link setup

A WRF lowering link rider from Big Sky Country asked for some setup tips. Our reply....

I'd follow the simple install instructions which are included, and set you
sag at around 94mm for starters.
Turn the shock's high speed compression (the big knob at the top of the
shock, not the flat blade) IN clockwise about 1/4 turn for starters. Then
turn in your rear shock's rebound (flat blade at bottom) a few clicks IN.

Slide the forks tubes up about 4mm. Test ride. Make adjustments to rear
first. Then fine tune.
You'll notice a huge increase in traction and plushness over the square edge
and braking bumps. Your main goal is to only have the rear bottom once or
twice per ride. You also want controlled rebound due to the extra leverage.

Email or call after your first test ride or two. At your weight it's a
pretty easy setup for off-road riding.

Monday, April 11, 2011

2003 WR450F suspension lowering spring rate question

Question: Hi,

I have purchased and fitted your lowering link for my Yamaha WR450F 2003 model and I have set all the suspension specs to factory settings. My problem is the suspension now feels very soft and has actually bottomed out a number of times, I know that I will need a stronger spring looking at your calculation on the website, however not sure of the specs needed, I weigh about 220 lbs, can you help?

Our reply:
The 2003 WR450F has a stock spring rate of 5.3 kg/mm. At 220 pounds (before gear) with the STOCK setup the spring rate for your weight is a recommended 5.7 kg/mm.

With the YamaLink's extra leverage the spring rate for your weight is 6.0 kg/mm

With proper sag you want the WRF to bottom just once or twice per ride but I know for a fact at your weight and the stock spring you are bottoming a lot more, the bike may understeer and you have too much sag. This is happening with and without the YamaLink because the 2003 WRF comes sprung for a ride weighing around 180 pounds.

Yamaha YZ 125 lowering kit question of the day

Does this kit fit the YZ 125? Also, does the kit lower the front and rear of the bike. or just the rear?

Reply: It fits certain years of the YZ 125: http://www.motorcycleloweringlinks.com/index.php?content=yamaha-yz-limited-lowering-link

As for the front: our super simple install instructions gives a starting point and some guidelines for raising the front forks based on personal preference and final rear sag setting. There is no 1:1 ratio since changes to rake/trail affect the geometry at a different rate than changes to the rear suspension.