And as for the bearings they are in the swing arm on a Paso and the pivot bolt itself does not rotate , probly all that's needed is a 20mm hole in the cases with a seal to keep the oil in .
Cant help thinking about that big wide tall rear head.......fitting ..............maybe that was the inspiration for the supermono . This aint the 1st time I heard of this planned mod and I do recall there being " clearance " issues but I don't recall ever seeing it finished .
A lot of the cases have the same pick up points ( SS , 851 , monster ect ) , not sure but you may have been able to use the the Paso cases .

Thanks for your non-constructive comments.
Maybe you should post some pictures of stuff you have built.

Non constructive ? nah , I don't see that . When you post pix of the 999s motor sitting in a Paso frame with the exhausts and throttle bodies/ air filters all sorted and looking good I will be among the 1st to congratulate you , but when its all still pie in the sky you gotta expect a little discussion ( why would you post if you weren't wanting discussion / feedback ) and , as I have alluded to ..... I have seen this type of project ( 4 valve engine in a Paso frame ) started more times than I have seen it finished .
I havn't built anything of interest lately , a trailer , a 20 ton press ( to rebuild my RD400 crank assy ) , a huge door made out of my Dads old spa pool decking , and I am repowering my Ford Capri with a ally V8 & 5 speed box ....... nothing that's relevant here.

Mc tool, you're right, no bearings just 2 oil seals (due to no movement as you correctly stated).
Still it seems to me a hell of a project.

Speedmade: how did you decide where to put the engine (aligning it)?
Do you think you can manage the larger heads with the fuel tank?

Really impressed with the fact that you want to combine the 4-valve heads with the Paso!
Have seen once or twice a similar attempt but can't recall seeing a finishend product.

No pain, no glory!

Keep up the works

Speedmade....... Mc Tool ........ Now Now Chidren

There was a guy from germany on here bock900R that put a ST4 motor and single sided arm in a 907 and finished it but we didnt get a road test report.viewtopic.php?f=3&t=5639&start=60 . Also JoKing on here put a ST3 motor in 907.