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post #1 of 12 (permalink) Old 09-16-2019, 06:16 PM Thread Starter
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2002 sprint st 955 charging issues

Greetings all. My battery flattens on my sprint! It takes a charge from the charger and all is well for a little while and then it needs to be bump started to get home.

Questions:

1. Where, exactly is the voltage regulator on this model located?
2. Which fuse is the one I should check for this problem?
3. Where exactly is the location of the ground connection to the frame/motor, so I can check that?
4. If the stator is bad, what is entailed in changing that?

Love the bike. Itís my second one. I have a GT WHICH I DONT LIKE AS WELLó70 extra pounds and a horrible seató and the double wall saddlebags are a terrible idea. Nonetheless, I have it and so now must wear it out.

Help, with these question!
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post #2 of 12 (permalink) Old 09-16-2019, 08:59 PM
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I believe your problem can be found on the left hand side of the bike right behind the top section of the shock.
No, I am not kidding.
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post #3 of 12 (permalink) Old 09-16-2019, 10:48 PM
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Itís heavy but not that bad. A Busa weighs more. The bags do kinda suck but itís a 02 which is what I have. At least you can put some stuff in it, itís not a beemer. Easy fix for the reg/ rec. if you want a heavy bike try my Suzuki GS 1150, the predecessor to the busa. 550 + lbs easy for a sport bike.

GO CHIEFS!!! Iím with Mahomes!
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post #4 of 12 (permalink) Old 09-16-2019, 11:03 PM
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The stator is relatively easy to change. You just need the appropriate gasket and some dabs of RTV sealant for the reinstall. You could just use a film of RTV around the cover if you don't want to bother with a gasket. As Mr. Ford alluded, You should inspect its connector as they will eventually burn up. The regulator is tucked under the right side of the frame near the foot peg. You will need the tank off to get to it and the ground strap will be accessible from there as well. The OEM SCR R/R is not reliable and worth replacing with a MOSFET shunt or a series regulator unit.

You would do well to replace the stator connector with a sealed unit. I just discovered a burnt out Metri-pack 280 so I can't recommend those. I'm replacing with a Meti-pack 630 and will be greasing the contacts since I've had issues with these overheating from oxidation.
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post #5 of 12 (permalink) Old 09-18-2019, 03:21 AM
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Quote:
Originally Posted by barefootjohn View Post
Greetings all. My battery flattens on my sprint! It takes a charge from the charger and all is well for a little while and then it needs to be bump started to get home.

Questions:

1. Where, exactly is the voltage regulator on this model located?
2. Which fuse is the one I should check for this problem?
3. Where exactly is the location of the ground connection to the frame/motor, so I can check that?
4. If the stator is bad, what is entailed in changing that?

Love the bike. It’s my second one. I have a GT WHICH I DONT LIKE AS WELL—70 extra pounds and a horrible seat— and the double wall saddlebags are a terrible idea. Nonetheless, I have it and so now must wear it out.

Help, with these question!
1.On the 2002 955 the regulator is located behind the cylinders block, on the back of the engine. Right side of the frame.
2.The fuse is # 11 (30A)
3.The ground is also behind the cylinders block, at the rear of the engine
4.As said above the stator is located behind the engine left cover. No particular problem to change it. Some caution is required though: Beware the centrifugal seal inside the cover is fragile. The magnet is VERY powerful so it's hard to remove the cover. The paper seal will suffer and will need to be replaced.


There is numerous threads about the subject for diagnosing. The usual upgrade is to change the stator if shot and change the RR as well. Now a days the series RR Shindengen SH847 is to be used where the FET FH020AA was the advice in the past.
Easternbeaver provides the furukawa connectors. The new RR will be connected directly to the battery - and + via a fuse older.


Fred
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post #6 of 12 (permalink) Old 09-18-2019, 04:58 AM
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Fred's right, right hand side of the frame.
I don't know what I was thinking! It's really buried in there.
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post #7 of 12 (permalink) Old 09-19-2019, 01:41 AM
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New reg/rec. new best battery, increased cable size for starter circuit.

It's possible to bump start a 955i with a flat battery? I assumed that the low voltage = inop ECU = no spark and no fuel. Big bike to run alongside and leap aboard!
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post #8 of 12 (permalink) Old 09-19-2019, 03:19 AM
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Quote:
Originally Posted by Dibnah View Post
New reg/rec. new best battery, increased cable size for starter circuit.

It's possible to bump start a 955i with a flat battery? I assumed that the low voltage = inop ECU = no spark and no fuel. Big bike to run alongside and leap aboard!
Yes it's possible in some cases. The voltage required to run the ECU is nothing to compare w/ the energy needed to run the starter.
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post #9 of 12 (permalink) Old 09-19-2019, 05:51 PM
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These bikes (ALL the Triples) are incredibly difficult to bump-start.
One other thing to note - you have to have ignition on (obviously) and when you do, the headlights will be on lowering the voltage even further - to give a fighting chance at a bump start, pull the headlight fuse. But even then, unless you have a good down-hill to assist you, unlikely it will start just off a push and jump on ........ (especially if you're a light-weight in which case the wheel will more likely lock and the tire just skid)
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post #10 of 12 (permalink) Old 09-20-2019, 01:49 AM Thread Starter
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What exactly IS there, please?
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