Front forks and geometry

[romus]

Could anyone provide some measurements related to the 907ie forks.

I have put 907ie swingarm on a 906 as well as tryign to keep 16" front wheel with higher profile trye. I am questioning how much I dropped/lengthenned the 906 forks - don't want speed wobble! I want to match the 907ie balance.

Would be helpful to have these measurements, which I cannot find in the manuals:
1. distance from bottom of handle bar tripple tree to centre of front axle.
2. distance from centre of front axle to ground
3. distance form centre of rear axle to ground
4. any rake angle info different than 906 if you know it. I think 907 is the same frame as 906, so in my thinking if I get 1-3 same measurements are the 907ie then it will be good.

Thanks a lot for any help.

[ducbertus]

Hi Romus,

I found the next measurements on my 907.
1) centre front axle- underside topclamp ± 780 mm
2) centre front axle - ground ± 288 depending on tire pressure, tire load, wear of the tire.
3) centre rear axle - ground ± 305 depending on ... etc., etc.
4) I'm not sure, but I think the angle rake is the same.

If necessary you can make longer nuts on the top of the tubes, like in the old Honda MT time.
Ducbertus

[ducbertus]

Hi Romus,

I found the next measurements on my 907.
1) centre front axle- underside topclamp ± 780 mm
2) centre front axle - ground ± 288 depending on tire pressure, tire load, wear of the tire.
3) centre rear axle - ground ± 305 depending on ... etc., etc.
4) I'm not sure, but I think the angle rake is the same.

If necessary you can make longer nuts on the top of the tubes, like in the old Honda MT time.
Ducbertus

[romus]

1) centre front axle- underside topclamp ± 780 mm
Ducbertus

Can I double check our langauge. I meant from centre axle to where the fork enters the top clamp from the bottom side. Is that what you understood?

[ducbertus]

Yes, because I couldn't measure the total lenght of the legs accurately. the handlebars, covering the top of the leg prevents that
so, the underside of the upper triple clamp was the easiest for me.

Ducbertus

[romus]

Yes, because I couldn't measure the total lenght of the legs accurately. the handlebars, covering the top of the leg prevents that so, the underside of the upper triple clamp was the easiest for me.

Ducbertus

Hmm would mean 907ie front forks 40mm longer than the 906 forks, but it is still not such a good measurement because it would depend on spring and oil in forks. Others below sure difference is 10mm.

[lofty 36]

Hi There

I have a 906 and 907 and the 907 forks are 10mm longer

Hope that helps not home for around a week but i'm happy to give you the mesurments on my return

Cheers Peter

[biffo]

hi romus as said before the 907 has 10mm longer forks i have a 906 which i converted 6 years ago to inch rear with 907 swing arm no probs has still 16 front very stable she is out to 944 and injected running a power commander best way to go best of luck Tim ps have a 907 not as stable

[romus]

hi romus as said before the 907 has 10mm longer forks i have a 906 which i converted 6 years ago to inch rear with 907 swing arm no probs has still 16 front very stable she is out to 944 and injected running a power commander best way to go best of luck Tim ps have a 907 not as stable

When you converted to 907 swingarm did you also drop your forks? So far I dropped mine 8mm. My maths would say I could do another 8mm since, but maybe its not a perfect science and my balance now might be just right. Certainly feels far far better on corners. Maybe a bit too sensitive steering coming up to the lights to stop - how's yours?

[paso750]

do 906 and 907ie shock have the identical length ?! Just wondering.

[biffo]

hi romus as said before the 907 has 10mm longer forks i have a 906 which i converted 6 years ago to inch rear with 907 swing arm no probs has still 16 front very stable she is out to 944 and injected running a power commander best way to go best of luck Tim ps have a 907 not as stable

When you converted to 907 swingarm did you also drop your forks? So far I dropped mine 8mm. My maths would say I could do another 8mm since, but maybe its not a perfect science and my balance now might be just right. Certainly feels far far better on corners. Maybe a bit too sensitive steering coming up to the lights to stop - how's yours?

hi romus as i fitted a higher profile front tyre i left the forks alone and its been ok

[ducbertus]

Hi Paso 750,

yes, as far as I know these are the same.

ducbertus