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Suzuki 644DS turning over very slowly on the starter

huw
Knight
huw
Knight
Joined: March 25th, 2016, 8:04 pm

September 12th, 2018, 6:32 pm #1

Just got a project 644DS to play with over the winter. It's been standing for a while and was a runner but when I try to start her the engine turns over very slowly. The battery is fine and if I take out the spark plugs it is a lot better but still very slow to turn over. The starter relay and starter solenoid are fine so before I take out the starter motor is there anything I should check? I hope it isn't a knackered starter or a partially seized engine!!!!
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Rob 110
God
Joined: January 31st, 2012, 10:39 am

September 12th, 2018, 7:54 pm #2

Does it bumpstart and run ok?

check starter: run a jumplead straight from battery to starter connector.
if it turns quicker, you know theres a voltage loss. Check solenoid/relay/earth/switch etc
if its same then starter
DIRTY R30 644 '03 TPS done, gubbins gone, GSXR can, 150 main, 27.5 pilot, needle 2nd position, K&N no lid
FILTHY 404DS '04: 152 main, 70 pilot air jet, 38 pilot, emm needle 4th clip, Quill T3. Sold :(
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jay
Duke
jay
Duke
Joined: March 3rd, 2012, 5:50 am

September 12th, 2018, 11:27 pm #3

Huw-Check to see if the fuel has gone into the engine.
AKA-THE DUCK
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huw
Knight
huw
Knight
Joined: March 25th, 2016, 8:04 pm

September 13th, 2018, 7:51 pm #4

Oil level is fine so I hard wired a battery to the starter motor and engine turns over very slowly as before. I have just tried to bump start the bike and I can get engine to turn (just) in 5th gear but it's really hard work even in this gear.
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Monty
God
Joined: January 30th, 2012, 6:02 pm

September 13th, 2018, 8:52 pm #5

It should bump easily in 2nd or 3rd, take the plug out and try, if it does not turn over easier I'd think something wrong with the engine, collasped bearing or something broke and fell off and jammed something
If it aint sharp I can play with it
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huw
Knight
huw
Knight
Joined: March 25th, 2016, 8:04 pm

September 14th, 2018, 8:02 pm #6

She turned over much better with plugs out but still hard work - I'm no muscle man though. Jay suggested checking the earth and I found what looked like a good main earth cable from battery to engine was in fact very frayed inside insulation. Swapped cable with the one on my R30 and engine fires up. Job done and thanks. Now to strip it down and start tarting her up.
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