lemans 1000 7/33 on a loop

[lazlokovacs]

gentlemen of the guzzi cognesenti here is my question -

ambassador 750 engine with an 1100 5-speed box and a LM 7/33 rear drive and swingarm - does that sound like a good combination?

(got a loop I'd like to rebuild and trying not to buy too many new parts)

and here's my second question, will the LM 7/33 mate up to the loop rear drum brake wheel?

[Luke]

The Le Mans 1000 has a longer swingarm and may cause clearance issues with the fender and/or require different shocks.

[jacksonracingcomau]

The Le Mans 1000 has a longer swingarm and may cause clearance issues with the fender and/or require different shocks.

I have a long mk 4 swinging arm on my 67 loopy, std fender no dramas
Yes, slightly longer shocks are wise, mine have ride height adjustment , useful when one plays with stuff.

And Charlie, clue was in thread title —— Le Mans 1000, all had long arms

[lazlokovacs]

thanks guys,

got most of it lined up on the bench today

can I use the loop swingarm?

750 engine + cali 5 speed gearbox + the original loop swingarm + lemans1000 rear drive?

[Antietam Classic Cycle]

thanks guys,

got most of it lined up on the bench today

can I use the loop swingarm?

750 engine + cali 5 speed gearbox + the original loop swingarm + lemans1000 rear drive?

No, you'll need a later swingarm. Why? The flange on the pinion carrier of 7/33 rear drive is 2 mm thicker than that of a Loop rear drive. If you bolt the 7/33 onto the Loop swingarm, and try to install the rear axle, you'll find the rear axle is cocked at an angle. 

[lazlokovacs]

thinking about this some more, (always a good step before diving in)

would the 750 engine be happier pushing a LM5 gearbox swingarm and rear drive?

[Antietam Classic Cycle]

thinking about this some more, (always a good step before diving in)

would the 750 engine be happier pushing a LM5 gearbox swingarm and rear drive?

Which 5 spd. or swingarm you use is going to make very little difference.

[lazlokovacs]

thanks Charlie,

so the cali 1100 5 speed and rear drive won't be geared too high for the 750??

I'm not looking for performance here, plan is to build a comfy 2-up rider.

[Antietam Classic Cycle]

thanks Charlie,

so the cali 1100 5 speed and rear drive won't be geared too high for the 750??

I'm not looking for performance here, plan is to build a comfy 2-up rider.

Cal 1100 gear ratios:
1st 1:2 (Z=14/28)
2nd 1:1.3889 (Z=18/25)
3rd 1:1.0476 (Z=21/22)
4th 1:0.8696 (Z=23/20)
5th 1:0.7500 (Z=28/21)

Ambassador 4 speed gear ratios:
• Low gear 1 to 2.230 (13-29)
• Second gear 1 to 1.333 (18-24)
• Third gear 1 to 0.954 (22-21)
• High gear 1 to 0.750 (24-1)

7/33 rear drive = 4.714 to 1
8/37 rear drive = 4.625 to 1
8/35 rear drive = 4.375 to 1
8/33 rear drive = 4.125 to 1

So, if using a Cal 1100 transmission and 7/33 rear drive, the over all gearing will be lower than the stock Ambassador gearing. A stock Ambassador engine will have no problem with that gearing. An 8/33 rear drive will be a bit too tall for a stock Ambassador engine though, IMO.

[Fontain25]

All stock parts on an Ambassador works good too.

[lazlokovacs]

yes, I did the same calculations the 8/33 is too tall. Also, after experiementing ion the garage a bit today, the Cal 1100 swing arm doesn't actually seem to fit either. The bracing on the non-drive side fouls the passenger peg part of the frame.

Problem is... I do have 7/33 and lemans swingarm but its about 700 miles away from the eldo!


hmmmm


thanks for the info