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Discussion in 'Airheads' started by Airhead Wrangler, Nov 2, 2012.
Why not just make the dampening heavier on ten?
"No, no, you don't understand... ours go to 11. That's... one more."
I just talked to racetech today and they finished the rebuild, but they did not change out the heim joints as they didn't have the size in stock. Does anyone know what size these use by chance so I can order them and have them shipped down? Anyone know a shop that stocks lots of old WP parts??
Where do you go when the road get really really rough???? 11 that's where! This one goes to 11!
Glad to see you have a bike to explore on, I know it was eating you up to be without your machine! This should help the days go by peacefully.
You gotta think that someone at that company has seen that mocumentary and intentionally did that. There's just no other practical reasoning for it.
Compression damping only goes up to 7. 7-11, maybe a craps thing? Donno.
Whatever the case, anyone know where I can get my heim joints?
I might regret this but... Whats a heim joint?
AKA: rose joint, spherical bearing, rod end bearing, etc. They're the pivot bearings at both ends of your shock. Most dirtbikes use one on the top of the shock and the other is in the swingarm or linkage, not the shock itself. You don't see them though as they have spacers and seals covering them up.
I'm sure glad you asked that SH.In all my years on bikes I've never heard of it.Thanks for the explanation AW.
Heim joints....have you tried McMaster Carr.com?
No dice. KTM bought WP and now WP USA has the attitude that if it's not on a KTM then they don't give a shit.
They only had SAE bearings, no metric. This is quite an oddball size. According to Prutser, it needs to be 25mmOD x 15.1mmID x 13mm thick. He's got a source for them from WP Holland, but even they are out of them right now.
I did a little more digging this afternoon. I opened up the carbs for a checkup and found the idle jets plugged solid with crud. It seems that the PO tuned the bike to idle just fine without even using the idle circuit. :huh Weird, cuz the thing runs just fine. It does start up VERY easily with no choke though, so I knew something wasn't quite right. Jetting was stock and the carbs appear to have not been messed with at all. I also ripped out all the pulse air crap and found the old air filter had holes all over in it, but the airbox was perfectly clean despite this. Good thing I ordered a new filter.
Only about a quarter of the holes are visible from this particular angle. The ignition wires are dried out and cracked, so they're getting replaced before they start shorting to the heads.
I also found that the bosch plugs in the bike now are two heat ranges colder than standard for the bike. Not necessarily a bad thing given my climate here, but I have a pair of stock heat range plugs on the way as well. I also bought new fuel line, but didn't get around to installing it yet. I'm chipping away at all the little stuff bit by bit.
...and a new project begins.
Just to dispell another internet myth: An R1100GS swingarm is neither 20mm narrower than nor the same width as a R100GS swingarm. I've heard mention of both being the case. I couldn't get a super-precise width on the R100GS swingarm, but it's just about exactly 10mm wider. An 1100 swingarm is 254mm wide.
does anyone know the relative lengths of the R100, R1100, R1150 swing arms?
what mods do HPN do for their paralever swing arm, is it in effects a reinforced R1100 arm?
looks to me that they are using an airhead para bevel box:
The R1100 is 355mm pivot to pivot, the R1150 341mm. I don't have an exact measurement on the R100 arm, but it's roughly 75mm shorter than the R1100 arm. The lateral position of the paralever pivots in relation to the swingarm pivots also differs between the 1100 and 100 arms by about a cm also. Somebody else sketched this up:
It's not a modified swingarm. They build it from scratch by welding AlMgSi1 (aka 6082) aluminum tube and machined pieces rather than using a casting. It's the same length as an R1100 arm, alledgedly much stronger, and also leaves plenty of space to use an 18" wheel without rubbing on the shock mount which is a problem with the R1100 arm. The end of the arm uses a machined ring that the paralever pivot pins thread into. The rest of the arm is composed of welded tube and plate.
This arm (maybe modified a bit) was also used on their R900RR Dakar race bikes:
so approx measurements are: (?)
G/S mono: 0
r100 Para: +5cm
HPN mono: +10cm
Do you know approx price of this HPN SA+ associated sub-frame/shock tower?
Hmmm. Not sure. Keep in mind that the measurements I gave you for the paralever type arms are from the swingarm pivots to the paralever pivots (not center of rear axle). The effective swingarm length (swingarm pivot to axle center) changes through the suspension stroke, so it's a bit tough to compare directly to a monolever where this doesn't happen.
Off the top of my head, no. They list the prices for the modifications to the main frame and for the shock mount subframe in their price list. They do NOT list the price for their swingarm or their machined rear hub which tells me they must be pretty spendy items.
had looked it up and could not find it. I fear you are right.
they look sweet
is there history of people breaking these 1100 swing arms that would justify the reinforcement?
what are you thinking in terms of shock set up? going vertical or diagonal?
if you are going for an airhead bevel box, can you mount the shock in standard 100GS mounting points - but with a monster long shock?
Last weekend some German HPN owner told me they charge 3000 for there swing arm.
He also told me that with the 1100 or 1150 swing 250mm wheel travel was the max. But if you would like to have more you would have to use there swing arm.