Moto Guzzi drive train failure

[Dodgyiti]

It's both unfortunately. Pete has said the diff end spline can be built up which is an option I had been considering.

Try for a second hand one first, building it up can weaken it's structure- still feasable but the repairer really needs to know what they are doing.

You poor bugger, this bike of yours has given a bit of grief lately. Hopefully this is the last thing and you can enjoy it when summer kicks in.

I did a clutch last week for someone, this is how I do them- be safe! She get's a bit wobbly when lifting the frame up

[sidecar bob]

A guy that may be able to help with repair or supply of parts is John Blaymires, He races classic sidecar #242 a Guzzi powered outfit.
He seems to know his way around those things blindfolded.
I can raise his contact details if required.

[MotoKuzzi]

At the moment I have it at an engineering shop in Pukekohe, getting an estimate for repairing the splines and bringing everything back to as close to original as possible. Will have to weigh that up against new prices. I'm reluctant to go second hand at the moment because it seems unlikely I would get low mileage and condition would be hard to assess before purchasing. The engineers have said the repair to the diff spline would be with metal of lesser hardness than original because they wouldn't be able to groove the splines with metal of the same degree of hardness. Apparently they repair tractor splines the same way ( lol ) with few problems. I'm figuring that if an original spline will exceed 500,000km with good maintenance this should do at least a 100, 000 if i maintain it to the same standard. Gotta find some of that BMW grease though.

[Madmax]

have done several repairs on strange aircraft engines
may be able to help

[Paul in NZ]

You really don't need the bmw stuff, just some hi impact grease amd as the man said, just a smear.

Yes - there is a universal up there - not as expensive as all that but expensive enough so you want to look after it. Occasionally, undo the boot and squirt a bit of oil in there to keep the rust at bay!

Removing the swing arm is easy - putting it back is easy (the second time).

try to get a manual and a copy of Guzziology. If you remove the clutch pm me or that dodgybugger for a lend of the cluch liney uppy thingy...

I feel for ya mate - that bikes plain mis behaving!

[MotoKuzzi]

have done several repairs on strange aircraft engines
may be able to help

Thanks will keep that in mind.

[Molly]

V11 has a different set up and you have to make really sure you line them up properly - theres heaps of info about it on the web but I never paid much attention cos I don't own one ;-)

Thanks. Just about 17,000 miles on my Guzzi at the moment so I'm hoping we've a lot of time ahead of us before too big a strip down. Not looking forward to that day though.

[MotoKuzzi]

You really don't need the bmw stuff, just some hi impact grease amd as the man said, just a smear.

Yes - there is a universal up there - not as expensive as all that but expensive enough so you want to look after it. Occasionally, undo the boot and squirt a bit of oil in there to keep the rust at bay!

Removing the swing arm is easy - putting it back is easy (the second time).

try to get a manual and a copy of Guzziology. If you remove the clutch pm me or that dodgybugger for a lend of the cluch liney uppy thingy...

I feel for ya mate - that bikes plain mis behaving!

Is hi impact same as extreme pressure ? Got the swing arm off and the universal looks and feels very good ( engineers comment ). I'm deliberating about the clutch, the only indication I've got that it could be due is the mileage otherwise it's been fine. The bike has given me a few problems lately but I've gotten used to that over the years with owning agricultural machinery ( seriously ). Appreciate the advice from everyone it helps.

[Paul in NZ]

If it aint broke don't touch it - having said that, the driven plates are cheap enough!

[SS90]

Yea, good advise "don't touch what ain't broke", is always good advise.

I have owned Guzzi's and BMW's, and to be honest, I pull the gearbox off both bikes at 80,000K's and greased the splines (neither needed clutches by the way)

for some trouble free K's, it could be worth the inspection.....clutches (even after market "beefed up ones" aren't expensive.)

Personally I would do it due to the condition of the rear spline.

You call!

[Paul in NZ]

One thing that roots the splines is people lugging the poor things about in top gear - they like to rev....

[Dodgyiti]

One thing that roots the splines is people lugging the poor things about in top gear - they like to rev....

Yep, true even for the Calli's.

If you do pull the clutch off (as Paul said) I have both the fine and course spline input cogs if you need them. I am actually out your way looking at a block of land on Saturday if that helps??
PM if you want?

Surflex clutch for your bike $260 @ MotoKiwi

[MotoKuzzi]

One thing that roots the splines is people lugging the poor things about in top gear - they like to rev....

Good point, short shifting is a characteristic of mine, and lugging in 50k zones in 4th or 5th. 3rd gear seems too twitchy around town. 95% of my mileage is open rd at 100k and no more than 10% above Common sense says I should look at the clutch but $$ says slap it back together and enjoy for a while longer. I read a thread on clutch removal last night and nearly fell asleep, one thing that did wake me up was the bit about counting threads on the swing arm bolts, which I didn't do in my tear apart mood. How can I make sure the swing arm is centred?

[Paul in NZ]

Same threads exposed each side of the bobbins, just wind em in till there is no play but not too tight. Check the housing lines up properly with the back of the box.

Also, check engine tuning, out of balance carbs, throttle bodies make them run like donkies (whoops - tiddly) down low!

[MotoKuzzi]

Think of a reasonable number ( $) and double it seems to me to be a reliable way to estimate the cost of repairs. Pinion spline, build up with weld and respline $600. Make new sleeve and respline one end of the drive shaft, $800. Versus new shaft $250 and new sleeve $150 from Italy. Still got the cost of the pinion spline rebuild to add though. Is there any good reason why a new or good 2nd hand pinion can't be mated to my crown wheel which is in good cond. ( New crown wheel and pinion $ 1400 from Italy )