Scooterotica

some more new products available at your bgm dealer.

first one is the Italian made ignition lock. built from NOS parts for us by Innocenti OEM supplier GRABOR. these can be used on battery as well as on non-battery scooters.

rrp is 89 €.



next one ist the bgm PRO Lambretta crankshaft. 60 mm stroke, 110 mm Yamaha con rod. forged crank webs. well elaborated balancing (100 gr. Tungsten weights on each crank web, additionally copper and hidden pockets.).

rrp is 299 €.

I can vouch for the crankshaft, quality piece of kit..

frank

Is the big end shimmed on the BGM crank?

yes, they are. the shims are 1 mm each.

additionally it comes with the 20 mm and 22 mm small end bearing to cope with the side play finding on different piston makes.

cheers


full advertising blurb:

Forged high primary compression crankshaft with Yamaha con rod.

The balancing was highly focused while the development took place. Thanks to the balancing weights combining Tungsten (100 gr. each side), copper weights and hidden pockets the crankshaft gives a very smooth engine run.

The Yamaha con rod with 110 mm length gives an easier life to the big end bearing. The delivery of every crankshaft contains a 3 mm base spacer to equal the longer rod. The lubrication of the big end is by two sufficient slots. The open cage silver bearing leaves nothing to be desired.

The diameter of the gudgeon pin is 22 mm. The combination with the right undersize to the crank webs and a special adhesive as a fluid is perfectly suited against twisting.

Upshot: All in all the bgm crankshaft gives the highest possible quality to every single component. Production accuracy, forging technology as well as the highly elaborated balancing leaves nothing to be desired.

The delivery does contain:

Crankshaft 60 mm stroke / 110 mm Yamaha con rod
Base gasket small casings - 3 mm
Base gasket large casings- 3 mm
Small end bearing - 20 mm width
Small end bearing- 22 mm width
Spacer for bearing 6305 - 0.5 mm
Spacer for bearing 6305 - 1.0 mm
Maghousing gaskets in three different thicknesses
Comprehensive fitting instructions

Seeing as you frequent this section and may not visit others and in relation to this thread http://scooterotica.org/forum/viewtopic.php?f=7&t=17734 could you explain the "sense" function of your new reg?

thanks for letting me know. IM would also have been fine...

cheers philipp

that crank looks good what strokes are you making/

at the moment 60 mm stroke with 110 mm con rod is the only one vailable.

we have made different one of cranks for customers. mainly 115 mm rods.

if you are interested in one of these, contact your bgm man.

there seems to be demand for the 57 mm crank with standard 107 mm con rod. anyone?

cheers philipp

Philipp, twisting always seems to be an issue with Lambo cranks, what BHP have these been tested to? Have you any recomendations?

hello,

yes, sadly we all know the problem of twisting cranks. if you get some things right, it shouldn't be a problem though. we have a very good European manufacturer and thanks to mark of mb one of the most experienced lambretta crank mans on hand.

hint is to fit the crank properly, using the right tools, torque wrench and double clearnces. good reference ist sticky's book.

we have tested the crank on different engines. ulf's and mine ts ones. i have attached the dyno sheet and we use the crank nearly two years now without probs. both engines use the Ancillotti exhaust though.



ulf's rubbish racer is used to test things on the dyno and is equipped with one of the very early prototype cranks. even without the yamaha con rod. this engine really is abused: