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Old 04-16-2010, 03:01 AM   #6721
Brendan J
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Coolhand at a wild guess it may be you voltage regulator try unplugging it and then see it if blows the fuse it that fails and the fuse still blows do what Ladder said !!!
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Old 04-16-2010, 04:43 AM   #6722
mait
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Originally Posted by MonstaBlokaz
But, hei mait, you also in Tallinn?
Maybe we could make a little ride some time soon
Yes I am near Tallinn. Just let me know where and when.
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Old 04-16-2010, 09:48 AM   #6723
Ladder106
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Has anyone tried a 16 tooth CS sprocket on the SR41s?

I'm finding it difficult to get a 15 T in the USA. I ordered a 16 and will try it . Rear sprocket is the standard 48 T.

Right now the bike will pull 5th gear to red-line (about 105 mph on my gps). I don't ride like that more than once or twice a year but don't want the bike bogging at 65-70 into a head wind or uphill.

I'd think the Big has enough twist to manage a 16 but wanted to know of any other experience out there.

Thanks
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Old 04-16-2010, 11:42 AM   #6724
bluesman
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Quote:
Originally Posted by Ladder106
Has anyone tried a 16 tooth CS sprocket on the SR41s?

I'm finding it difficult to get a 15 T in the USA. I ordered a 16 and will try it . Rear sprocket is the standard 48 T.

Right now the bike will pull 5th gear to red-line (about 105 mph on my gps). I don't ride like that more than once or twice a year but don't want the bike bogging at 65-70 into a head wind or uphill.

I'd think the Big has enough twist to manage a 16 but wanted to know of any other experience out there.

Thanks
Well, I can't comment on sprocket size as I always use standard combos but one thing. I guess you know what you getting into using even number of teeth front and back... I would really avoid that....
I had experience with even number of teeth on both sprockets (previous owner excercise) and believe me or not but my chain and sprockets got busted in only 6000 km! And that was il4 bike....
I think there is some other bike sprocket that fits, but model escapes me....
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Old 04-16-2010, 12:13 PM   #6725
mait
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A different approach

http://www.youtube.com/watch?v=ryWty_HaWV8

Found this on youtube. Bike thing is not for me but still interesting project.
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Old 04-16-2010, 12:25 PM   #6726
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Quote:
Originally Posted by bluesman
Well, I can't comment on sprocket size as I always use standard combos but one thing. I guess you know what you getting into using even number of teeth front and back... I would really avoid that....
I had experience with even number of teeth on both sprockets (previous owner excercise) and believe me or not but my chain and sprockets got busted in only 6000 km! And that was il4 bike....
I think there is some other bike sprocket that fits, but model escapes me....
Dr600 85-89
sp600f 85
dr650 90-95

the sprockets from those bikes fit but the sprocket is a little narrower (7.2mm on those, 10mm on 750-800) but maybe you can fab a spacer? or maybe ask in Canada online motorcycle stores?


SP600, SP600, DR650



DR750-DR800

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Old 04-16-2010, 03:15 PM   #6727
robmoto
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Quote:
Originally Posted by Ladder106
Has anyone tried a 16 tooth CS sprocket on the SR41s?

I'm finding it difficult to get a 15 T in the USA. I ordered a 16 and will try it . Rear sprocket is the standard 48 T.

Right now the bike will pull 5th gear to red-line (about 105 mph on my gps). I don't ride like that more than once or twice a year but don't want the bike bogging at 65-70 into a head wind or uphill.

I'd think the Big has enough twist to manage a 16 but wanted to know of any other experience out there.

Thanks
Gidday Ray I am now running a 16 on the motard don,t no from memory what the rear sprocket is but at 3900rpm its doing 100klm or your 60mph it suits this bike beautifull but you will have to run a smaller bottom chain pully I car,t remember now but may have been a 650 top chain pully because its smaller.
On Shannon,s old 750 it had on it a 16 and was beautifull on the road, last weekend I changed to a 15 and found it reving slightly reving to much for the power these biks have for the open road arround 4400 for your 60mph, but if doing bush riding standard 15 ok I do have some 14 teens in stock but have never tried them yet and will be using one on my 750 scrambler project shortly.

I have never herd about the even number of teeth thing this is new to me , maybe it is like soldiers walking instead of marching across a bridge.

A Genuin susuki 15 here costs 83 bucks.
A JT 15 about 23 bucks but don,t do here 16teens.
Supersprox 95/043716 part no suzuki dr 85/89 is what I use for a 16 tooth.
Just looking at my 91 dakar and it got a 16 on front allso but carn,t comment because I have only ridden it breifly when I bought it ages ago.
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Old 04-16-2010, 03:53 PM   #6728
zappa71
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1 tooth more at the front is like 3 less on the back, no problem for the BIG.
My first BIG had even a 42 at the back, that was okay on the road except for the part that i had to go down to 1th gear a lot riding in the city corners.
And the iron engine protector that goes around the front sprocket wont fit so you have to make one that will fit, same with the 14..
And yes, when you don't use the protector a broken chain will brake your engine cover.. some time's even with..

You get more chain/sprocket wear when 1 specific chain link gets around at the same place at the sprocket .. so some sprocket combis wear faster then others because of that..

So some combinations of chain length and sprocket size's wear faster than others.. you can find it on the @ what's recommended
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Old 04-17-2010, 03:25 AM   #6729
1989jojo
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Gday,
I heard the sr42 has no rev limiter, is that true? my big doesnt spin over 7000 anyways, because it seems she doesnt get enough air. what peak rpms have you all reached yet? in agerman forum sb claimed 8000rpms . 24m/spistonspeed cant be healthy, but is it ok to spin to 7000 if i want it to last? thanks for answers
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Old 04-17-2010, 04:20 AM   #6730
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Zappa summed it up nicely - yes, when you have even number of teeth on both sprockets same link of chain always contacts same teeth of sprockets which inevitably make wear not that much faster, but very uneven. You will see particular sections of chain and sprockets wearing more than other.
This is why is is generally recommended to use odd/even combo and you never find even number on both sprockets on stock setups.
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Old 04-17-2010, 08:52 AM   #6731
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Not a lot of room under the CS cover. I don't think a 16 is a good idea. Chain much too close to cases for my comfort level.

I forgot all about the even-even sprocket problem. Thanks for the reminder. I'll look at other models thanks to Jabrokas illustrations. I don't think the "thinner" sprocket will be a problem. The sprocket is located by the large plate that sits in the output shaft groove. There is really no reason to fill the gap between the sprocket and the seal on the case is there?

I did some chain-drive research yesterday. Interesting. All the engineering sites recommend a minimum of a 17 T drive sprocket to "avoid harmonic vibrations and increased wear" but I've never seen a motorcycle with a 17 T CS sprocket.

I'm sure the M/C engineers are aware of this. Why do they always give us 15s? I understand that space and weight is at issue when designing a bike but it would seem that reduced chain wear would be a good thing, no? Primary and transmission gear ratios could certainly be adjusted to cope with better drive-line sprockets when the bike was on the drawingboard.
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Old 04-17-2010, 11:37 AM   #6732
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Check this out - in the papers it's a suzuki, 1989, 727 cm³, 37 kW. I looked at it for quite a few seconds before i realized what it really is;)

http://www.mototehnika.ee/used/381232

and DONT you buy it - I'm working on it already! a brother in law of mine just rode my big today and decided he's got to have one...

;)

cheers, juss
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Old 04-17-2010, 12:30 PM   #6733
juss
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hey, welcome Kraade!! You must be at least 5th Estonian here!

Hereby we start a campaign - Estonians to be the first nation to have one million members in the DR BIG thread!!! xD

FYI - there is less than million estonians in the world! ;) yeah - we're special. and we almost always have some BIGs available.
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Old 04-17-2010, 02:24 PM   #6734
MonstaBlokaz
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Quote:
Originally Posted by juss
Check this out - in the papers it's a suzuki, 1989, 727 cm³, 37 kW. I looked at it for quite a few seconds before i realized what it really is;)

http://www.mototehnika.ee/used/381232

and DONT you buy it - I'm working on it already! a brother in law of mine just rode my big today and decided he's got to have one...

;)

cheers, juss
How come you just noticed it? It has been for a sale for atleast 2-3 years. It was with a price 40 000 kroons when i bought mine.

I finished my saddle project, think it looks really nice.

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Old 04-17-2010, 11:37 PM   #6735
mait
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Quote:
Originally Posted by MonstaBlokaz
How come you just noticed it? It has been for a sale for atleast 2-3 years. It was with a price 40 000 kroons when i bought mine.

I finished my saddle project, think it looks really nice.
wow MonstaBlokaz that saddle looks nice. You did it all yourself?
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