birdseye said:
No holes drilled and yes there was a tight fit.
If there is variability in both the engine and the bars, they cant accurately pre drill the holes. So they use pointed grub screws that make their own indentation in the place they need to do.
If you think about it, there's lots of this sort of adjustability elsewhere. Like where the exhausts fit together for example.
Exhaust pipes are not load bearing structures, so pipe clamps/springs at major junctions to keep the gases in are acceptable. And as the pipes are subject to thermal cycling from minus x degrees C upto perhaps 500/600 degrees C in the header pipes it is essential to have some designed in give or they will at first deform and soon break.
Load bearing structure has to have structural integrity, and any built in flex has to be designed in, not just arrive by accident of design failure or rotten manufacturing procedures.
As the crankcase is fully machined using either jigs or cnc to locate all the drilled and tapped holes, and they then align with a jig built sub frame front and rear, I am willing to bet that the crankcase hole location is well within a hole location tolerance of perhaps 0.1 millimetres. Four thou for the metrically challenged.
However H&B are producing a not very sophisticated welded assembly of tubes and brackets and apparently cannot get the holes to align within about 2/3 mm from the pics.
It seems probable that the jigs and/or procedures they are using are inadequate for the job. So they now rely on elongated holes(no location capability until put under stress)/crushing the tube with a pointy grub screw which, among other things cannot give a solid location and will leave a good starter for rust. And once a circular structure(tube)is crushed out of round by the grub screw the inherent strengh provided by the shape goes away exponentially.
This poor approach to design can also be seen where they join the horizontal and vertical tubes by welding, and crush the end of the horizontal tube to avoid having to profile the tube end to provide a structurally sound welded joint. This is a crime against nature in any load bearing structure and would get your toy thrown out of any well scrutineered event if perpetrated on the frame structure. Just try it on a roll cage.
This design and construction is so poorly engineered and executed you should all get a no quibble refund plus a large drink to compensate for all the agro of fitting this junk.
) and mine have a bolt that goes in from the back in the area of # 3 on your diagram. The bar # 7 has hole with centre bit # 1 is tapped. My impression from the fit is that it would have been easier to work from the centre bar to the other L & R protection bars.
