BF Suspension Upgrade
#1
I have been working with a friend on his BF for the past 3 weeks this is what we have done to his machine.
1) Fabricated and installed longer A arms in front for a wider stance of 2 inchs.
2) Fabricated and installed longer A arms in the rear with 2 inchs wider stance and a more swept design to the rear. This was to add stability plus reduce the flip over feeling of going up hill.
3) Custom built shocks from Elka a cost that my buddy hasn't told me I imagine they are expensive!!!!
4) Custom sway bars that mount longitudily from the body to the to both rear A arms.
5) Rear and front drive shafts were modified to work with the extended A arms.
His BF is only another 1.5 inchs taller but has almost twice the shock travel as stock, so far the ride is very plush no body roll.
His Quad will be featured at the Bike show this January 7 to 9 in Calgary. I will give a ride report after this weekend.
1) Fabricated and installed longer A arms in front for a wider stance of 2 inchs.
2) Fabricated and installed longer A arms in the rear with 2 inchs wider stance and a more swept design to the rear. This was to add stability plus reduce the flip over feeling of going up hill.
3) Custom built shocks from Elka a cost that my buddy hasn't told me I imagine they are expensive!!!!
4) Custom sway bars that mount longitudily from the body to the to both rear A arms.
5) Rear and front drive shafts were modified to work with the extended A arms.
His BF is only another 1.5 inchs taller but has almost twice the shock travel as stock, so far the ride is very plush no body roll.
His Quad will be featured at the Bike show this January 7 to 9 in Calgary. I will give a ride report after this weekend.
#3
No pics yet we haven't really had a good chance to give it a try just down the alley which the neighbors are not crazy about, lol. We are going out this weekend to give it a run. So far the shocks were a lot at least that much I know. The original sway bar was lacking at least some people have said this so I took 2 sway bars off 2 Toyota trucks I was hoping to use 2 from a Suzuki 4x4 truck but couldn't find 2 of them. It might be to stiff but will have test it out first. I was thinking first to move the rear differential back 2 inches but found it would easier to adapt the A arms. So far basic riding shows promise. If the weather holds out this weekend we will try trail riding, off camber hills, down hill, up hill, and jumps to see how it works. I can tell you the shocks are a definite plus. I am using the basic same axles this may not be the best will wait to see what happens. So far in materials alone not including my time or the shocks was $110.
#5
HughJazz,
We had it out for an entire weekend. The only problem we had were the bars for the stabilizer they were to thick didn't allow for flexing that well. So we ran the quad without stabilzer bars all weekend. It handled the rough stuff like a spider going over uneven terrain, the body remained motionless while the wheels moved up and down like the legs of a spider it was interesting to watch. Since we took off the sway bars traveling side ways on hills the body wanted to twist in the direction of the hill. Once it warms it we will be on the look out for thinner material for the sway bars. One concern I have had about IRS is going up steep up hill climbs most systems crouch in the back and lift the front end not a confidence building feeling. This time I must say the quad acted in a different way which was a surprise for me took me by surprise. This is the best way for me to explain it. On most IRS machines at least this is my observation the centre of gravity seems to be roughly in the middle of the machine. If you notice on sport quads the whole quad will sink on take off where the centre of gravity is roughly the middle of the front wheels. This is what happens with the new A arms it seems to extend the centre of gravity farther out front instead of the middle of the quad, the whole quad sinks not just the back end. Another analogy is if you hold your arm out at a right angle beside you bent at the elbow. Stretch your fingers straight out resting them on say a glass. Now move your elbow up and down keeping your arm straight from finger tip to your elbow this is the action I observed. At least it doesn't lift the front end and it is harder to produce a wheely as well.
At the bike show there was a US investor who is very interested in the modd they shall remain nameless at least till we can come to arrangement. I can say there was a lot of interest it may be in a popular magazine in the future.
We had it out for an entire weekend. The only problem we had were the bars for the stabilizer they were to thick didn't allow for flexing that well. So we ran the quad without stabilzer bars all weekend. It handled the rough stuff like a spider going over uneven terrain, the body remained motionless while the wheels moved up and down like the legs of a spider it was interesting to watch. Since we took off the sway bars traveling side ways on hills the body wanted to twist in the direction of the hill. Once it warms it we will be on the look out for thinner material for the sway bars. One concern I have had about IRS is going up steep up hill climbs most systems crouch in the back and lift the front end not a confidence building feeling. This time I must say the quad acted in a different way which was a surprise for me took me by surprise. This is the best way for me to explain it. On most IRS machines at least this is my observation the centre of gravity seems to be roughly in the middle of the machine. If you notice on sport quads the whole quad will sink on take off where the centre of gravity is roughly the middle of the front wheels. This is what happens with the new A arms it seems to extend the centre of gravity farther out front instead of the middle of the quad, the whole quad sinks not just the back end. Another analogy is if you hold your arm out at a right angle beside you bent at the elbow. Stretch your fingers straight out resting them on say a glass. Now move your elbow up and down keeping your arm straight from finger tip to your elbow this is the action I observed. At least it doesn't lift the front end and it is harder to produce a wheely as well.
At the bike show there was a US investor who is very interested in the modd they shall remain nameless at least till we can come to arrangement. I can say there was a lot of interest it may be in a popular magazine in the future.
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