monsta rebuild

[greenmonster]

Any pictures of the bracing on an 888 frame?

1991 factory 851/888:






More: http://www.madeinitalymotorcycles.com/new_page_27.htm

[Duck-Stew]

Frame plugs won't fit with the Nichols Ti bolts as they stick out past the ends of the frame lugs.

BTW, I'm a Nichols dealer...  PM me and I can set you up. 

[kopfjäger]

Frame plugs won't fit with the Nichols Ti bolts as they stick out past the ends of the frame lugs.

BTW, I'm a Nichols dealer...  PM me and I can set you up.  

I have Ti bolts on the 859 with frame plugs.

[monsta]

kopfjäger, are your bolts the same as these below?  the have a really long 'nut' on the ends... anyone guess why they do that?

[truckinduc]

Its to distribute the force going through the frame - bolt over more material.  It spreads out the load and is supposed to give the rider better feedback.

[monsta]

but the contact area of the nut is on the face, the rest of it is in the breeze..

[Duck-Stew]

but the contact area of the nut is on the face, the rest of it is in the breeze..

True.  The long nuts on the Nichols 10mm engine mounting bolts are for access to tighten the nuts.  They're a might long IMO, but they're really nice.  (I've had a pair on my CR now for many years...)

[kopfjäger]

I think (can't remember) but I think my Ti engine bolts were from TPO?

[Duck-Stew]

I think (can't remember) but I think my Ti engine bolts were from TPO?

That would make sense...

[kopfjäger]

That would make sense...

That would be a first for me. 

[truckinduc]

I thought I read the long nut is to fit tightly in the bore of frame.  Therefore if its a tight fit it also distributes the load.  Its not just the face of the nut in contact.  But if the nut isnt a tight fit that theory is blown out of the water.

[Speeddog]

I don't think the frame 'tube' fitting is accurate enough for that.

I thought I read the long nut is to fit tightly in the bore of frame.  Therefore if its a tight fit it also distributes the load.  Its not just the face of the nut in contact.  But if the nut isnt a tight fit that theory is blown out of the water.

[dbran1949]

I could be wrong on this so please no flame, I have a physics background I am not a ME.

As I understand it when you properly torque a nut, you are in fact, properly stretching the steel bolt the nut is attached to.
It is the steel bolt's attempt to return to normal, or spring tension that applies the clamping force desired. In this application the clamping force presses the base of the nut against the frame which presses the frame against the case.

Two things about the Nichol's TI bolt

thing 1: It is TI so it doesn't stretch like steel so maybe it uses the extra thread length to spread out the force because it is using the thread friction to supply the clamping force... or

thing 2: from what I read on the Nichols site the TI bolt is very stiff compared to the steel bolt it replaces. This property allows less movement (frame relative to case) which is where the improved feel comes from

Finally the bigger nut could just be there to reduce stress on the steel tools normally used to torque the nut so you don't round out the inside of the socket you are using to tighten it down

just my .02 and I'll add like everyone else who has been reading this thread  --  fanfukintastic work
This thread and Truckers Monster rebuild are the two best on the forum

[Howley]

I could be wrong on this so please no flame, I have a physics background I am not a ME.

As I understand it when you properly torque a nut, you are in fact, properly stretching the steel bolt the nut is attached to.
It is the steel bolt's attempt to return to normal, or spring tension that applies the clamping force desired. In this application the clamping force presses the base of the nut against the frame which presses the frame against the case.

Two things about the Nichol's TI bolt

thing 1: It is TI so it doesn't stretch like steel so maybe it uses the extra thread length to spread out the force because it is using the thread friction to supply the clamping force... or

thing 2: from what I read on the Nichols site the TI bolt is very stiff compared to the steel bolt it replaces. This property allows less movement (frame relative to case) which is where the improved feel comes from

Finally the bigger nut could just be there to reduce stress on the steel tools normally used to torque the nut so you don't round out the inside of the socket you are using to tighten it down

just my .02 and I'll add like everyone else who has been reading this thread  --  fanfukintastic work
This thread and Truckers Monster rebuild are the two best on the forum

make the beast with two backs off.





























































Just Kidding.

[monsta]

anyhow..
I'm gunna spring for them and decide if I will modify them or the frame plugs when I eyeball them.
Kinda bad timing because the frame's at the painters and I have to drill out the existing engine bolt thread to fit em, but shouldn't be a big deal..

more stuff off to the powdercoaters..



out of interest for some, I took these pics while pulling engine apart.
this one show's existing rear cylinder oil jet hole that I mentioned I midified earlier. Note that the crank wheel will come around and block flow for 180deg.



this one shows the other side of rear cylinder where the hole has been drilled in the modded cases. when oil jet comes from here crand wheel dosn't interfere..




By the way... thanks everyone for the encouraging comments!