to sag or not to sag?

[Devon Jarvis]

I read somewhere that sag should be (for roadrace bikes) about 33% of suspension travel with the rider on board and in his/her usual riding gear. Funny that it's the same for offroad bikes, either I've got it wrong or the magic is in the damping. Unladen sag is not so important since the motorcycle is rarely operated without a rider on it. I have the recommended 2" spacers in the front and I have too much sag as well. Did you get the LR series 500-560lb/in spring, or the lighter 350-450lb/in spring? The LR didn't come with any additional preload collar, and doesn't seem to need one. I would get a friend to measure the sag when you are seated on the bike, the rider's weight makes a HUGE difference in how the back suspension works. My A15 topped out when parked even with the stock rear spring. Devon A15 Brooklyn farrider55 wrote:

> Just installed Progressive springs up front and the rear spring over > stock shock. With spacers up front cut to recommended 2in length > there is 2in sag to forks (unladen-with no rider). This feels to > soft. But is it? Using 420cc of 10 weight oil. > The rear shock is now topped out (unladen). Included with the spring > is a 3/4in plastic collar to preload the spring. I can remove the > collar and try to adjust sag with the shock preload adjuster. But > what amount of unladen sag should I be trying to end up with? > I read that for off road bikes that loaded sag should be about 1/3 of > suspension travel. Unladen sag should be 3/4 to 1 1/4in to vary > with the weight of the rider and to reach recommended loaded sag. > Are these figures useful to dual sport bikes? > Rider weight is 150 pounds. > > Harvey

[DS125R@aol.com]

While my KLR is all in pieces and I am waiting on a part, does anyone know the difference between the impeller on a KLR and the impeller on another dirtbike. I mean besides thread size and maybe the seal, are all impellers different sizes? I didnt notice the impeller for the KX125 I owned was bigger than the one for my KLR or not. Just wondering because I see Boyesen makes so called 'power impellers' that have different angled blades that supposedly move water better or something. I was just wondering if anyone knew anything about the impeller sizes. Thanks Dave