Xs1100r

[Schming]

To tell the truth, I'd use a lightened Special fender and fork brace over the XJ fender; it really is a heavy mother and can't be helping unsprung weight, although the swirly wheels are lighter than the XS units.

As to 'matching' final drives, they're all the same regardless of the rear wheel, just different finishes unless you're thinking of a 750/850 FD swap. Personally, I'm not a fan of the FD swap as it will reduce performance IMO.... and I like performance...

Point taken on the fender, Steve.

I'm definately keeping the stock XS 1100, low ratio, FD. I had a brain fart and wondered if the XJ's rear hub spline was the same, or would fit the XS FD, but I don't recall ever reading anything different about FD's between the XS & XJ.

OE mounts, I'm not trying to use the engine for strength, I feel that the engine castings are not strong enough, I've seen many crashed XS1100's with broken rubber mount holes broken simply from the jolt of sudden stopping.

I do shim the OE mounts when fitting them, rolled shim around the mounts makes them tighter in the engine holes, but to bring the mounts back to new spec.

Thanxs for the reply, Tom.
I'll keep that in mind if I decide not to solid mount the engine.

[Eveready1100]

Got some last very interesting bits of info regarding the RH and 5K7 Sport models.
Regarding the swingarms, they are listed as the same part as the previous EFGH standard and Special types, so there's nothing trick about them. Yamaha must have thought them up to the task.

A factor not mentioned so far are the motors. For all intents and purposes, they are 78E in specification. Same cams and small valve heads are used, and the pistons are of Euro 2H9 heritage. Not sure what the differences are between the euro pistons and the US types, as the part numbers are different, but someone should be able to chime in with an answer to that riddle.
All else appears the same with the rest of the engine parts, but there has been a modification to the oil pan, with the addition of an extra windage tray, presumably to combat oil surge under braking and acceleration.


Here's a pic I've borrowed off Shappers, showing the difference between the Standard sump on the right with the 5K7 one on the left


Another view.

[jetmechmarty]

Not looking at how it mates to the case, is that a crank wiper on the pan?

[Schming]

Hi Errol, would you be able to post the width and height of the extra anti-slosh plate that the RH & 5K7 pan has ?

Easy enough fabrication if it makes a difference.

[Eveready1100]

Sorry, Schming. I've only got a wriggly framed, oil surging Special here at home. Shouldn't be too hard to make it close enough in size just from going off the photos

Just thinking that as the Sport / RH models had the early model based motor with the extra ponies, may have been the reason for not selling these models in the states due to the ever more strict requirements for meeting US pollution control standards.