Need tuning tips for my lemans

[amamet]

1977 lemans 1. So now that’s it’s running smooth and well I figure I’d tackle some tuning. I believe my jetting is stock but during the rebuild I went with the 88mm Gilardoni kit, Zard exhaust and a p9 megacycle cam, Alu timing gears (already had those) and it has KN filters. It runs well, pulls strong and I haven’t noticed any flat spots. Any advice on rejecting? Leave it as is?
Thx
Allen

[PeteS]

Some of this will depend on what kind of gas you get, also if your valve springs are stock or not. I ask because mine will pull well over 8K RPM in 5th and it didn't do that with the stock 135 main. I had to go with 143s. No dyno but learned this on succesive 1/4 mile runs. You don't want to rev that high with stock springs.

Pete

[Rich A]

Also depends on your elevation.

[amamet]

I believe hd springs. Can’t remember. I’ll have to check with mike rich. I never got a invoice of all the work he did. We hung out and chit-chatted too much and I forgot to get everything in writing for what he did

[blackcat]

This is what I have in mine:

K5 needle on the bottom clip
AB 265 Needle Jet
60 Pilot Jet
140 Main Jet

Mine is stock except for the Raceco cam and the Lafranconi’s

[moto-uno]

 ^ That sounds pretty good . I ended up with 165 MJ , but it's also got an 89mm bore ( high comp wiseco pistons ) , a Mega cycle 620 cam , larger diameter header pipes and muffler
from BUB and 40 mm Dellortos , I also twin plugged the heads and was able to back off full advance because of it . When I was done ( I worked at a Harley dealership in Ottawa that
had a dyno ) I got 70.4 HP out of it ( although that required removing the baffles from the BUBs and the K&N air filters . It was roaring in that dyno room :) . Peter
PS: I also had to put a washer under the jet needle clip ( from H-D dyno jet kits )

[lucky phil]

1977 lemans 1. So now that’s it’s running smooth and well I figure I’d tackle some tuning. I believe my jetting is stock but during the rebuild I went with the 88mm Gilardoni kit, Zard exhaust and a p9 megacycle cam, Alu timing gears (already had those) and it has KN filters. It runs well, pulls strong and I haven’t noticed any flat spots. Any advice on rejecting? Leave it as is?
Thx
Allen

Yes, get rid of the aluminium timing gears. They are rubbish. Revert to the chain or the gold standard Joe Caruso steel gears.

Ciao

[flower_king001]

Yes, get rid of the aluminium timing gears. They are rubbish. Revert to the chain or the gold standard Joe Caruso steel gears.

Ciao

I have a set of them gears (hanging on garage wall)that sheared in my IV. Went back to a chain and been good ever since.

[lucky phil]

I have a set of them gears (hanging on garage wall)that sheared in my IV. Went back to a chain and been good ever since.

Yep good move. When I was in Mandello in 85 my friend was picking up a new Mk4 Le mans from Agostinis and he had them fit alloy gears. The first set was so noisy they pulled them out and installed a fresh set, not a comforting feeling for a bike that's going to take you around Europe. fast forward to 2012 and having a few Daytona engines apart and seeing the alloy gears fitted to them and the wear plus other peoples  experiences over the years with alloy gears on big blocks I'm happy to nail my colours to the mast on them, junk.
Both my Daytona and V11 Sport engine have steel gears fitted. Necessary? No, but very nice to have.

Ciao

[jacksonracingcomau]

First, almost every mile I’ve ridden since 1983 has been with Ago timing gears spinning underneath me.
Secondly, Daytona oil pump gears were a SNAFU, unrelated to above.


So

Without prejudice or conspiracy to start keyboard war

If OP wants to detune his bike with a heavy set of gears or a parasitical sprung loaded chain adjuster, I want the removed gears.

This happened a few years ago, swapped a pair of rooskin gloves for a used set of Ago gears , thanks Wildguzzi and internet myths.
Haven’t done much with them,  only  80,000 km (50Kmiles) so not claim of century,, but happy to do same again, have many more miles on other engines, in fact, the timing chain on my Lario will be first maintenance chuck
If I could put alloy gears in that, I would, I lightened f#ck out of sprockets but still heavy things.
Heavy and parasitical,

[Aaron D.]

Those gears have been in that bike about  20 years and a lot of fun miles.
I know the stories. And I'd put a set in again if I had a Guzzi again-assuming the chain was needing replacement.

[kfz]

Has anyone said take gears out....

[Aaron D.]

Has anyone said take gears out....

Yes.

[Old Jock]

Wonder how Pete's doing these day 

To be fair there does seem anectotal evidence from more than one forum member here that Agostini gears are Ok

My opinion, for all that's worth, would be to remove them, if it goes pear shaped then the engine might make a nice coffee table

[moto-uno]

 Nice to see all the middle of the road replies  .! Peter

[Old Jock]

I meant to ask what the different SNAFU with the Daytona gears were jacksonracing.

I know all about the oil pump but there were also issues with the Alloy oil pump and service shaft gears too a seperate problem entirely, where they fractured in a manner not dis-similar to that seen with the after market gear sets installed to the 2 V/V engines

If you know more I'm all ears

[lucky phil]

First, almost every mile I’ve ridden since 1983 has been with Ago timing gears spinning underneath me.
Secondly, Daytona oil pump gears were a SNAFU, unrelated to above.


So

Without prejudice or conspiracy to start keyboard war

If OP wants to detune his bike with a heavy set of gears or a parasitical sprung loaded chain adjuster, I want the removed gears.

This happened a few years ago, swapped a pair of rooskin gloves for a used set of Ago gears , thanks Wildguzzi and internet myths.
Haven’t done much with them,  only  80,000 km (50Kmiles) so not claim of century,, but happy to do same again, have many more miles on other engines, in fact, the timing chain on my Lario will be first maintenance chuck
If I could put alloy gears in that, I would, I lightened f#ck out of sprockets but still heavy things.
Heavy and parasitical,

I wasn't actually talking about the Daytona oil pump gears in isolation. More the jackshaft drive gear. I've got 2 or 3 of them in the workshop that are effectively junk. Not failed but with severe enough wear on the drive faces that you wouldn't contemplate using them again.

Ciao

[amamet]

  The gears will stay in unless they explode, in that case...
The person that helped me with the internal parts said they looked fine and not to worry. Hes very reputable. That being said there’s no guarantee on anything. Worse case scenario,  unless it kills me, is having to rebuild another motor.
  My original post really had to do with carb jetting changes and what direction if at all. Bike feels good to me so far. 500 miles completed. But like I said, Carbs are setup as stock and engine and breathing are far from stock

[lucky phil]

  The gears will stay in unless they explode, in that case...
The person that helped me with the internal parts said they looked fine and not to worry. Hes very reputable. That being said there’s no guarantee on anything. Worse case scenario,  unless it kills me, is having to rebuild another motor.
  My original post really had to do with carb jetting changes and what direction if at all. Bike feels good to me so far. 500 miles completed. But like I said, Carbs are setup as stock and engine and breathing are far from stock

Yes I know, I take full responsibility for the side track, sorry.

Ciao

[amamet]

All good. I’m glad you (all) chime in with info that I certainly don’t have. I appreciate everyone’s responses.

[moto-uno]

  Well . there's always replies #4 and #5 . I believe we both actually own round head Le Mans  . Peter

[jacksonracingcomau]

Yes I know, I take full responsibility for the side track, sorry.

Ciao

And I should have waited for OP response before jumping in like a vulture for a set of “gold standard” gears
Of course they should be used, if they are Ago straight cut and correctly fitted. No experience with other types myself, but 100’s of K miles (and years racing) with these.

I meant to ask what the different SNAFU with the Daytona gears were jacksonracing.

I know all about the oil pump but there were also issues with the Alloy oil pump and service shaft gears too a seperate problem entirely, where they fractured in a manner not dis-similar to that seen with the after market gear sets installed to the 2 V/V engines

If you know more I'm all ears

No , Daytona story has been told a million times
Dr John might tell you whose fault it was but the fact he used Ago gears in the 2 valve says he probably did in the pre production 4 valve. The change of pattern / supplier may have been budget or otherwise, but it cost dearly in the end.

The gears in the later (chain driven) 8v have proven good since a very early recall to fit belleville washers .
AFAIK no failures since then

Just proves all gears are not born equal I suppose, bit of thought into design and installation is needed.