16 x 40 gearing.

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900streetfighter
Posts: 364
Joined: Wed Oct 27, 2010 5:52 pm
model: 907 I.E.
year: 1992
Location: Essex UK

16 x 40 gearing.

Post by 900streetfighter »

Changed my chain and sprockets the other day, all bits I've been hoarding, an EK x ring chain that cost £20 on ebay, a 16T front sprocket I bought years ago and a new 40T rear cog I found under my stairs. Not very impressed with the EK chain, the inner link side plates have a (lightening?) hole in them which I think is a weak or stretch area and the soft link plate holes were too small. It wouldn't go together(even with mole grips) until I reamed it out a bit. I made a 3mm plate from dural years ago that adapts any flat face(SS etc) sprocket to the correct offset for 907. a couple of old clutch spring screws are the right length for the retaining clip.
I've been round the block a couple of times on it and i think I prefer the taller gearing.
Im off to the UK Gathering this weekend so with about 500 miles to do, I'll see how I get on with it.

Cheers, Keith.
Tamburinifan
paso grand pooh-bah
Posts: 1527
Joined: Thu Jun 21, 2007 12:00 am
model: 907 I.E.
year: 1991
Location: Gothenburg, SWEDEN

Re: 16 x 40 gearing.

Post by Tamburinifan »

Odd to me,
14/40 is my flavour.
Why do you prefer 16/40?
Gert

907 I.E. -91
M900 -97
MTS 1100s -07
900streetfighter
Posts: 364
Joined: Wed Oct 27, 2010 5:52 pm
model: 907 I.E.
year: 1992
Location: Essex UK

Re: 16 x 40 gearing.

Post by 900streetfighter »

Longer gears. I seem to be changing gear less in town.
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ducinthebay
paso grand pooh-bah
Posts: 1323
Joined: Sat Sep 03, 2005 12:00 am
model: 750 Sport
year: 1990
Location: SF Bay Area

Re: 16 x 40 gearing.

Post by ducinthebay »

I'm surprised you got a 16 to fit in there, but if the shoe fits….
15 / 40 is common, as is 15/39. I'm running 15/42 on Sport/scrambler, and 15/39 on my Sport.

Cheers, Phil
Duc in the Bay
1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
2002 ST4s - Lots of mods.
900streetfighter
Posts: 364
Joined: Wed Oct 27, 2010 5:52 pm
model: 907 I.E.
year: 1992
Location: Essex UK

Re: 16 x 40 gearing.

Post by 900streetfighter »

Plenty of room around 16 sprocket. 108 chain only just long enough though.
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