Yet Another M900 Build

[PPuxley]

Originally Posted by Darkness

Found this whilst looking for something else

http://www.ukmonster.co.uk/monster/s...light=Silencer

Probably the original ‘95 silencers albeit shortened. Useful photo’s of the writing on them though.

Useful, thanks. MR said they couyld be either Remus or Sil Motor. Those are the first Ive seen with Sil Motor in all my trawling.

[Darren69]

Ah so they're Sil Motor ones? The correct Cagiva style font though. I would just restore it with the bits you have and then look to source more original bits for things like exhausts because finding nice ones now would be hard and that anodising on them will be hard to repair if they were scratched at all. I haven't seen any that have no major marks/scuffs etc on them.

[PPuxley]

Originally Posted by Darren69

Ah so they're Sil Motor ones? The correct Cagiva style font though. I would just restore it with the bits you have and then look to source more original bits for things like exhausts because finding nice ones now would be hard and that anodising on them will be hard to repair if they were scratched at all. I haven't seen any that have no major marks/scuffs etc on them.

Agree. The cans will be easy to change to OEM from the Sil Motor carbons it comes with, as and when a decent set of OEM crop up. I would only attempt to make a set of OEM cans good if I could get the casing off, strip it and then re-anodise. If I couldnt get it off then the polishing route is really the only way to go.

[Darren69]

Check the cylinder heads because the standard M900 at around that time had 750 heads and you want the bigger valve 900SS heads. So I wouldn't spend a lot on refurbing them until you confirm thaey are the best ones. It knocks a fair bit off the power, like 5 HP or something. You want the heads that are stamped V2!

[PPuxley]

Originally Posted by Darren69

Check the cylinder heads because the standard M900 at around that time had 750 heads and you want the bigger valve 900SS heads. So I wouldn't spend a lot on refurbing them until you confirm thaey are the best ones. It knocks a fair bit off the power, like 5 HP or something. You want the heads that are stamped V2!

Noted. Ive just been going through Buzzers Build post and noting down post numbers etc I can go back to on a reference spreadsheet. This is another bit of info going on there, thanks .

[Luddite]

Originally Posted by Darren69

Check the cylinder heads because the standard M900 at around that time had 750 heads and you want the bigger valve 900SS heads. So I wouldn't spend a lot on refurbing them until you confirm thaey are the best ones. It knocks a fair bit off the power, like 5 HP or something. You want the heads that are stamped V2!

There's a bit more info. about the head markings here: http://www.ukmonster.co.uk/monster/s...d.php?p=584456

Also, if you're taking the engine apart, consider changing the head studs. Early ones are noted for being brittle and having a tendency to snap. More info. here from http://www.ukmonster.co.uk/monster/s...d.php?p=560939

Post #808

Originally Posted by 350TSS

I know early 900 Monsters/SS had problems with cylinder head studs breaking and that you can get improved studs. I am pretty sure my engine has never been apart before so I almost certainly have the “defective” studs.
Does anybody know if there is any way I can identify whether or not the studs I have are the old or new type?
Before I take the heads off I would like to order the studs if I need them, but obviously do not want to order the new improved studs if they are already in there.

Post #809

Originally Posted by utopia

As far as I'm aware, the brittle ones are silver coloured and the stronger ones are black.

Post #810

Originally Posted by Luddite

As well as the colour difference, as Utopia said, aren't they also identified by a code letter? I think it's 'M' for the old ones and 'O' for the new.

[Darren69]

I would recommend Ian Falloons 'Monster Bible' it's the Laverda Green book but without the servicing/maintenance aspect. All press photos and specifications but it gives a good insight into model development. It'[s not as good/detailed as his Supersport book but but they both have good info.

[PPuxley]

Originally Posted by Darren69

I would recommend Ian Falloons 'Monster Bible' it's the Laverda Green book but without the servicing/maintenance aspect. All press photos and specifications but it gives a good insight into model development. It'[s not as good/detailed as his Supersport book but but they both have good info.

Yes, Ive been reading it. Just been looking at it re the big valves. According to the book they had the SS 900 valves even in the 93 version....or did they get even bigger than 43mm inlet/38mm Exhaust. See page 8 which is talking about the 93

[PPuxley]

Originally Posted by Nasher

I have a really nice set of Standard M900 Cans on the M900 I'm trying to sell at the moment.
http://www.ukmonster.co.uk/monster/s...ad.php?t=59070

I took my Remus Ducati Performance cans off it as I wanted to use them on my next project, but it's been mentioned by a couple of people enquiring about it that the standard cans don't go with the other mods.

What sort of condition are the Sil-moto cans in?
There could be an opportunity for a swap.

Nasher

Hm, theres a thought. Cant answer that question yet, the bike has just been loaded in the van in Inverness. Just received this photo

[Nasher]

I have a really nice set of Standard M900 Cans on the M900 I'm trying to sell at the moment.
http://www.ukmonster.co.uk/monster/s...ad.php?t=59070

I took my Remus Ducati Performance cans off it as I wanted to use them on my next project, but it's been mentioned by a couple of people enquiring about it that the standard cans don't go with the other mods.

What sort of condition are the Sil-moto cans in?
There could be an opportunity for a swap.

Nasher

[PPuxley]

All good info, thanks. Yes I know about the studs- the black ones will be going back in if theyre not there already.
Still not clear on the V2 big valve head, from the dates in that post No19, wouldnt all Monsters have a V head?

So Just to clear this up

W - 750/900 small valve Hemispherical combustion chamber OR/VR Cams
V - 900 big valve Bathtub combustion chamber OHT/VHT Cams

From january '92 up, all engines came with aluminum-bronze (replacing the cast iron)
valve guides and a "V" on the heads,

V1 revised valve seat
V2 had revised oil feed
Unsure when the crossover was but
V3 late injection 08J/V8J cams head is fully interchangeable with V,V1,V2

Some heads manufactured prior to 92 were revised at the factory so it does get confusing as its possible to have a 90/91 manufacturing date on a head that has 1992 spec

The cam id used is what they came out of the factory with don't take it as gospel as many people swapped 08J/V8J into earlier heads or if lucky you might find OHZ/VHZ (ST2) or GMO9/GMV9 (Ducati Performance)

[Darren69]

It was a marketing ploy. The small valve 750 head was fitted to the standard Monster for a while in order to make the 900 'S' version with the standard 900SS head more attractive (more powerful).

[PPuxley]

Originally Posted by Darren69

It was a marketing ploy. The small valve 750 head was fitted to the standard Monster for a while in order to make the 900 'S' version with the standard 900SS head more attractive (more powerful).

No, Im still not clear. When was the change? According to Ian Falloon's Book and that post by Kato all that was before 93...what am I misunderstanding?

[Luddite]

Originally Posted by PPuxley

No, Im still not clear. When was the change? According to Ian Falloon's Book and that post by Kato all that was before 93...what am I misunderstanding?

The first divergence from the 900 Supersport motor came for the 1997 model year and continued up to and including the 1999 model year.

The full power version gave 80hp at the crank while the small valve head was 77hp.

[Darkness]

Originally Posted by PPuxley

No, Im still not clear. When was the change? According to Ian Falloon's Book and that post by Kato all that was before 93...what am I misunderstanding?

You should be OK with an early ‘95 model year, assuming it’s still how it was built at the factory.

‘The best engine came in all 91 to 97 900 SS and SL bikes. These engines were also used in 900 Monster up to engine number 037727 ( late 1996 build ) and the 98/99 900 Monster Special.’

http://www.bikeboy.org/900equal.html

The V2 (Hopefully) or W casting marks are very clear on each cylinder head, on the near side, just forward of the spark plugs.

You’ve also asked about rebores and replating: do you know of engine woes, or are you just reading up in case?