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electric start 24v

Joined Feb 2011
9 Posts | 0+
i have owned 3 bergs. 99 600 01 fc470 o2 650 the elect start has been a problem on 470 and 650. 12v is not cutting it i have spent hours on this problem i changed to a bigger starter a honda cbr-600 starter. stronger but still would not start the bike. i took a chance and hit the starter with 24v direct bike fired right up. starter was not even warm. on 12v got hot real fast. i am an electriction by trade and a mercury outboard mech. i have ran 24v to powertrim motors with no problems. i am going to try 18v to the starter and see what happens via a ballast resitor if one of these setups works long term. i will be a happy camper. having the motor start so easy on the button is better than christmas. i have started it countless times on 24v no hot starter and no problems as of yet. heck what did i have to loose. a starter! long term who knows but for now im loving it.two small 12v batt not that much xtra weight. charging both batt may take some doing but i will figure it out. i will keep the site posted on the progress of it.
 
Long term it's probably the comm that's going to burn out but, as you've found, 24v spins the motor so fast and with so much more torque that it's only required in short bursts so it could last years!. The only problem I can foresee is if you have another problem preventing the engine from firing, say fuel or spark related and you're cranking the engine excessively.
 
yes that could be a problem. but i have had to deal with stator problems in the past. just how it is. not to many carb problems after altering the slide.anyway the bike starts so easy now. olny ? is why i did not try this sooner as with most mods its trail and error. maybe at a high price if something breaks. but i will take the chance.my left leg cant take it any more.other than starter problems. i have no complaints there is just something about them.love hate. call it whatever its hard to get away from them.just like my allison bass boat with 300+hp till death do we part! well you know
 
You could wire it up like this but I wouldn't do it in case it burnt the starter out. You would need an extra On/Off Switch to select between "Charge Battery" and "Start Mode". You would also need a big external Battery Starter Solenoid, a normal 30Amp Relay, a change over 30Amp Relay and 3 Fuses.

I remember getting a look at Craig Baileys F1 boat once and seeing 2 x 12Volt Batteries in it and wondering why. He said the 2 x Batteries were connected in series to provide 24Volt to the 12V downward motor trim. That way he could get the motor trimmed down real quick.

OLD+SKOOL+24V.jpg
 
if 24v is too much you could make up a lithium iron phosphate pack with one extra cell you'd get around 16V would have to get hold of or make up a regulator for it

Ive seen 16V lead acid batteries / alternators in US sand buggy mags dunno if you can get small versions
 
My Toyota Landcruiser has two 12v batteries in parallel for standard 12v electrics but uses a 12 to 24v switchover relay to connect them in series during engine cranking to power the 24v starter. The relay is cylindrical, around 2.5" dia by 4" long. This relay would probably be perfect for the job apart from the fact they're over £400 new (UK price). You could always try and source one from a breakers maybe.
 
Reminds me of 6v VWs with 12 v conversions. Showing my age :(

I'm sure this has been discussed a forum or two ago, but the search engine doesn't like 24v or 24 v.

Steve
 
I'm sure this has been discussed a forum or two ago, but the search engine doesn't like 24v or 24 v.

Steve[/quote]


Must be a 12v search engine then bro :)
 
with all being said i know the 24v system will work. the reley is not an issue. one can still power the relay coil with 12v from one batt as i do with my boat powertrim. one can also use a elect contactor say 30 amp rated with a 24v dc coil. as far as the electrical starter. armature has thick windings as for the brushes a 4 brush system will hold the voltage. it takes less amprage to spin the motor with24v than with 12v. try it on 12v then feel the starter .or fry an egg on it. on 24v. starts the motor so fast it does not have time to heat up. at 6 am this morning i hit the starter once fired right up. no choke almost like fuel inj it was 39 deg outside. if this all works out it will be the best thing i ever did to the bike .i was more wore out starting the bike than riding it. im sure a rewound stator would have helped but the e start would still have been a problem. input from other people is a good thing. new ideas and help gives us hope things can be fixed or made better. or easier to use. my riding buddies use to say sell the husabergs and buy a bike that starts easy. until they rode the 470 and the 650 they said they might own one if the e start worked. i think im on the right path with the 18 or 24v system.time will tell.
 
ljgiroux said:
it takes less amprage to spin the motor with24v than with 12v.l.

A 12v motor run at 24v will draw more current 'cos the windings are designed for the lower voltage and will (in effect) offer half the resistance at twice the voltage...... ohms law and all that. As has been said though the bonus is quicker starting and shorter starter duration even though you effectively lower it's duty cycle. In your situation with the observations you have made I'd say go for it, the only caveat being to exercise caution if the bike becomes reluctant to start for some reason requiring longer bursts from the starter.
 
It was quite some time ago but there was a post where a factory mechanic had suggested to a member to use 24v to get the 01 & 02 models to e-start without much tinkering. The issue that came up was only one battery would be charged by the bike.

An off the shelf under-the-seat battery box would facilitate making the conversion. There was once one available from a German company but none closer to home that I know of.
 

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