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Author Topic: Hondazuki XLRM250 Trans-America Hell Ride  (Read 35765 times)

Offline irk miller

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Re: XL250 Trans-America Hell Ride
« Reply #30 on: Mar 01, 2016, 20:38:02 »
Alright, so this is where I'm at with the RM front and XL250r rear...



Looks right at 29.5 degrees. I'll see where the RM rear puts me.


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Offline Tune-A-Fish©

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Re: XL250 Trans-America Hell Ride
« Reply #31 on: Mar 01, 2016, 20:54:35 »
So by XB spec.. Money shot  :o
"I didn't come here and I ain't leavin"  Willie Nelson

"love hard, live fast, die fun" Kacey Musgraves

"Like a Wreckin Ball!" Eric Church

Offline xb33bsa

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Re: XL250 Trans-America Hell Ride
« Reply #32 on: Mar 01, 2016, 20:57:40 »
as long as the level is accurate..
is the bike level? actually it doesn't have to be level you can burn however many degrees of level it is
be careful where you plant the trunion of the level the steer head housing is not always an accurate trunion bed
you can plant it on a fork tube as long as the wheels are inline and the trunion is dead center of and looking straight ahead

Offline irk miller

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Re: XL250 Trans-America Hell Ride
« Reply #33 on: Mar 01, 2016, 21:24:48 »
It's accurate. Here's the XL frame with total RM suspension front and rear. The gauge sits at 28 degrees.








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Offline xb33bsa

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Re: XL250 Trans-America Hell Ride
« Reply #34 on: Mar 01, 2016, 21:31:23 »
but you got crazy too much swingarm drop so that rear suspension geometry is all wrong ...you will have to...start over

Offline irk miller

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XL250 Trans-America Hell Ride
« Reply #35 on: Mar 01, 2016, 21:32:54 »
:( im'a go back to XL250 suspension and see where it's at.

Also thought to put a cradle in the  XL250 frame.  The 73 motor does not fit in an 84 frame in no kinda way without some chopping.
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Offline xb33bsa

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Re: XL250 Trans-America Hell Ride
« Reply #36 on: Mar 01, 2016, 21:38:04 »
set the suspension back up on the rm frame what you must do is observe the swingarm pivot ,c/s and rear axle
you will need to take the spring off the shock which was the very first thing you should have done
withn the spring off the shock you can observe plot and mimick the rm suzukis geometry
the chain tight point i call it ,the straight line of the 3 axis
this straight line will occur somewhere in wheel travel usually about middle of
that all needs to be done and duplicated on the donor frame before head angle can be set

Offline xb33bsa

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Re: XL250 Trans-America Hell Ride
« Reply #37 on: Mar 01, 2016, 21:49:34 »
observing and documenting the rm's original rear suspension geometry(including chain tight point and c/s location) is also how you determine where the xl's c/s is located
what try for is as close as you can get it
why ? because then you automatically have the best channce of the least chain slack variation and rub issues along with, what suzuki felt was ideal ,for the effect of power delivery on the suspension ,the location of the chain tight point in wheel travel ,squat anti-squat one or both motogp bikes are extremely sensitive to this you would be too if you wieghed 350 and had 300 hp
but it also makes a huge dif with 10hp  trying to claw that last way up that slippery steep trail littered with greased bowling balls
and its fun observing the geometry and plotting
« Last Edit: Mar 01, 2016, 21:51:54 by xb33bsa »

Offline irk miller

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XL250 Trans-America Hell Ride
« Reply #38 on: Mar 02, 2016, 00:08:13 »
Alright, a little research.  This bike is intended to be an enduro with as much off road capability as I can muster.  At the same time, it will get me from Augusta, GA to the NW Georgia Mountains, the Appalachian Trail and the Blue Ridge Parkway this summer. 

1975 XL250

rake 32°
trail 5.5 in

CR250m

rake 32°
trail 5.7 in

2003 RM125

rake 27º 30′
trail 4.53 in
clearance 13.8"



This

Rake 31°
Trail 5.6 in
Clearance 13.8 in
Top tube height 32.5 in

Offline xb33bsa

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Re: XL250 Trans-America Hell Ride
« Reply #39 on: Mar 02, 2016, 00:56:06 »
the longer the travel is the tighter the head angle must be pulled in
its the........