900ss Mufflers on a 907 ?

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Turin
Posts: 49
Joined: Tue Jun 21, 2011 2:16 am
model: 907 I.E.
year: 1991
Location: chandler, az

900ss Mufflers on a 907 ?

Post by Turin »

I have a set of BUB reverse megaphones that I'd like to put on my 907. Problem is they are for a 900SS. Is there an easy way (like using a 900ss crossover) to mount them?


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Occupants of my Island of misfit toys:
'00 MG Quota, '97 MG Daytona RS, '87 MG Lemans SE, '75 MG 850 T, '69 MG Ambassador, '96 Triumph D1200, 91 Duc 907 IE
1986 Guzzi BOTT Racer
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Mc tool
paso grand pooh-bah
Posts: 1794
Joined: Wed Dec 05, 2007 12:35 am
model: 906 Paso
year: 1990
Location: Newzealand

Re: 900ss Mufflers on a 907 ?

Post by Mc tool »

Apart from getting bent bits of stainless tube to fit ,how would they affect fueling ? I dunno much about injection, or 907 ,are they easy to adjust fueling on .
They are cool looking pipes . I guess it depends how much money you want to throw at it ,but Id be inclined to do away with the cross over and go for two single pipes with a link pipe between them. :)
I wish I was young again............Id be heaps smarter than last time
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Turin
Posts: 49
Joined: Tue Jun 21, 2011 2:16 am
model: 907 I.E.
year: 1991
Location: chandler, az

Re: 900ss Mufflers on a 907 ?

Post by Turin »

Already have a stage II Ferracci chip. Fueling wont be an issue.
Occupants of my Island of misfit toys:
'00 MG Quota, '97 MG Daytona RS, '87 MG Lemans SE, '75 MG 850 T, '69 MG Ambassador, '96 Triumph D1200, 91 Duc 907 IE
1986 Guzzi BOTT Racer
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Mc tool
paso grand pooh-bah
Posts: 1794
Joined: Wed Dec 05, 2007 12:35 am
model: 906 Paso
year: 1990
Location: Newzealand

Re: 900ss Mufflers on a 907 ?

Post by Mc tool »

mm just looking at your shed and I too have 850t ,a 1974
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I wish I was young again............Id be heaps smarter than last time
User avatar
Turin
Posts: 49
Joined: Tue Jun 21, 2011 2:16 am
model: 907 I.E.
year: 1991
Location: chandler, az

Re: 900ss Mufflers on a 907 ?

Post by Turin »

I love Guzzi's. Here is my T.
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Occupants of my Island of misfit toys:
'00 MG Quota, '97 MG Daytona RS, '87 MG Lemans SE, '75 MG 850 T, '69 MG Ambassador, '96 Triumph D1200, 91 Duc 907 IE
1986 Guzzi BOTT Racer
User avatar
Mc tool
paso grand pooh-bah
Posts: 1794
Joined: Wed Dec 05, 2007 12:35 am
model: 906 Paso
year: 1990
Location: Newzealand

Re: 900ss Mufflers on a 907 ?

Post by Mc tool »

I got given my bike . We had to use loppers to cut all the ivy that had grown up thru the bike just to be able to move it .
I have since bought another stock disc and a pair of f08 calipers and the spacer with the intention of going double disc .
Probly should drag it outa the shed and give it a run but the battery has finally crapped out ( it be 15 years old , so not to bad ). It has all the dyna ignition bits and now wanting some PHF carbs , I have a spare pair of heads of a lemon ( ebay ) that I might port ...... sorta depends on what size carbs I find , and then some proper exhausts . The headers are stock but #ucked ( inner tubes collapsed ) crossover is home made as are the heat shields and the mufflers are Chinese copy nortons . It got it going at the time .There are a few other parts that don't belong too.
I wish I was young again............Id be heaps smarter than last time
User avatar
Turin
Posts: 49
Joined: Tue Jun 21, 2011 2:16 am
model: 907 I.E.
year: 1991
Location: chandler, az

Re: 900ss Mufflers on a 907 ?

Post by Turin »

Does it still have the chrome bores? They tend to flake off. Heads off of a lemon? LeMans heads are only useful with the matching pistons. In reality, there's not much difference between a lemans head and the T heads.

I can give you my recipe for a sweet running 850 motor that will rev and make power to 7500 rpm and will have no issue going past 100mph on a budget.

I also have a couple of Guzzi's with wilder (and more expensive) tuning.
Occupants of my Island of misfit toys:
'00 MG Quota, '97 MG Daytona RS, '87 MG Lemans SE, '75 MG 850 T, '69 MG Ambassador, '96 Triumph D1200, 91 Duc 907 IE
1986 Guzzi BOTT Racer
User avatar
Mc tool
paso grand pooh-bah
Posts: 1794
Joined: Wed Dec 05, 2007 12:35 am
model: 906 Paso
year: 1990
Location: Newzealand

Re: 900ss Mufflers on a 907 ?

Post by Mc tool »

It has steel liners , and that was the issue . Some guy took it to the local rural garage for a rebuild and they #ucked it up , fitted liners and bored them to tight and it seized almost straight away , the guy packed a shitty and chucked in the shed ..... for 20 years . there was ,apparently a bit of agro with his brother who wanted it but the guy sold it to my bro in law for next to nothing rather than let his brother have it . So my bro in law chucked it in another shed .... yeah, the one with the ivy , and did nothing to it . I give him shit about letting a classic go the waste and he eventually got sick of me and one day gave it to my Mrs .... ergo it is now mine :lol: . So I stripped it down and found LOTS of new bits . Cleaned all the crap out of the crankshaft , honed a bit more clearance into the bores , fitted a dyna cdi and coils , bigger alt , made my own wiring harness and fuse/ relay set up , fitted Yamamha XZ 550 switches ( looked about the right age ) GN 250 blinkers and a Yamaha AG 175 farmbike rear light and rack, new fork inserts and rear shocks , shimmed the gearbox and new bearings and painted it with spray cans .......oh yeah , new seals in the diff..... which still weeps . I scored a set of lemon pistons but they are a bit big so I havnt bothered .
Sure would be keen the hear how to get it going a bit better . I suspect my VHB,s are a bit knackered ( I did put some new bits in them ) hence the eye out for PHF,s .
Hamish
I wish I was young again............Id be heaps smarter than last time
User avatar
Turin
Posts: 49
Joined: Tue Jun 21, 2011 2:16 am
model: 907 I.E.
year: 1991
Location: chandler, az

Re: 900ss Mufflers on a 907 ?

Post by Turin »

My goal was to build a period sportbike that would have equaled or surpassed a V7sport or a LeMans. These mods happened over a decade.

#1 36 Del'ortos with the lip of the intake port smoothed out to get rid of the step. Meh, not much really. Bigger carbs are a waste by themselves.

#2 Norris S/ Megacycle X9 camshaft. That made a noticeable difference. more midrange and revs higher. better.

The heads were a bit tired and I had to pull them to install gilardoni cylinders and pistons. While off it was time to tweak them.

#3 full head porting /shaping with stainless valves. the squish was set to .040 with thinner copper head and base gaskets. That really woke thinks up.

#4 Added Lemans flywheel with mild lightening. I have a couple of other guzzi's with crazy light flywheels. I wanted some flywheel effect for this one.

#5 Mistral headpipe and crossover. ( didn't do much. I already had open conti replica mufflers on the old exhaust.)

What made a lemans hustle was the high compression pistons. The rest of the engine is pretty standard. The cylinder heads are not all that different. I have one head and did a comparison. exhaust valves are 1 mm larger. intakes are 3mm. The intake ports on both heads are about the same size! I have a LeMans engine with new pistons and cylinders that I thought about installing and decided it wouldn't be worth the hassle.
Occupants of my Island of misfit toys:
'00 MG Quota, '97 MG Daytona RS, '87 MG Lemans SE, '75 MG 850 T, '69 MG Ambassador, '96 Triumph D1200, 91 Duc 907 IE
1986 Guzzi BOTT Racer
User avatar
Turin
Posts: 49
Joined: Tue Jun 21, 2011 2:16 am
model: 907 I.E.
year: 1991
Location: chandler, az

Re: 900ss Mufflers on a 907 ?

Post by Turin »

here is another Guzzi of mine. The local dealer retired in 1997 and in 2015 he sold me / had me clear out his guzzi stuff and junk including his racebike which needed put back together.
https://www.youtube.com/watch?v=cwCuJc_ToTw
Occupants of my Island of misfit toys:
'00 MG Quota, '97 MG Daytona RS, '87 MG Lemans SE, '75 MG 850 T, '69 MG Ambassador, '96 Triumph D1200, 91 Duc 907 IE
1986 Guzzi BOTT Racer
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