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Turning engine over - starter motor only

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droog
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PostPosted: 14:31 - 05 Aug 2021    Post subject: Turning engine over - starter motor only Reply with quote

Hi guys, I hope everyone is doing ok.

My CBR600 F4i (fuel injected model) has been sitting for well over a year and I would like to turn the engine over for a few cycles using the starter motor (only) to give the camshafts a coating of oil before I start the bike up for real.

I just need to check that my technical preparations are correct beforehand:

1: Fuel pump (located underneath fuel tank) wiring disconnected so fuel pump will not
prime and feed the fuel injection system (so I'm not spraying neat fuel into the
cylinders).

2. Spark plugs and coil packs disconnected and removed so I don't damage coils/electrical
system, plus no compression so easier for the engine to turn over.

3. Throttle held open when applying starter motor.

Is there anything I got wrong or missed out? Thanks. Very Happy
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droog
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PostPosted: 14:32 - 05 Aug 2021    Post subject: Reply with quote

Or maybe I should just take off the valve cover and give the cams a squirt with an oil can to give them a decent coating of oil and start the bike normally?
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stinkwheel
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PostPosted: 16:37 - 05 Aug 2021    Post subject: Reply with quote

Overthinking. Shorting across the terminal posts of the starter solenoid with the ignition off will turn the engine over without any chance of it starting.
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blurredman
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PostPosted: 17:19 - 05 Aug 2021    Post subject: Reply with quote

Do FI bikes not have killswitches? Genuine question- never had one.
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Nobby the Bastard
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PostPosted: 17:28 - 05 Aug 2021    Post subject: Reply with quote

Blurredman wrote:
Do FI bikes not have killswitches? Genuine question- never had one.


They do, but mine turns off everything on my nbike the same as the ignition does. I thought that it was normal.
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droog
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PostPosted: 19:06 - 05 Aug 2021    Post subject: Reply with quote

stinkwheel wrote:
Overthinking. Shorting across the terminal posts of the starter solenoid with the ignition off will turn the engine over without any chance of it starting.


I'm sure you are a 100% right - but I'm convinced if I take that route I'll make a mistake and blow the electrics Embarassed

Bike is already stipped down so removing the coil packs and plugs, and unplugging the fuel pump won't take long - then I'll turn it on the starter (throttle open) a few times to get some oil over the cams.

Cheers Very Happy
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droog
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PostPosted: 19:10 - 05 Aug 2021    Post subject: Reply with quote

Blurredman wrote:
Do FI bikes not have killswitches? Genuine question- never had one.


Yeah, as stated by Nobby they have kill switches - starter motor won't turn with the kill switcch on.
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stinkwheel
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PostPosted: 23:06 - 05 Aug 2021    Post subject: Reply with quote

Droog wrote:
stinkwheel wrote:
Overthinking. Shorting across the terminal posts of the starter solenoid with the ignition off will turn the engine over without any chance of it starting.


I'm sure you are a 100% right - but I'm convinced if I take that route I'll make a mistake and blow the electrics Embarassed

Cheers Very Happy


Nothing to blow. It's unfused and the cables are the width of your finger.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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droog
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PostPosted: 06:46 - 06 Aug 2021    Post subject: Reply with quote

stinkwheel wrote:


Nothing to blow. It's unfused and the cables are the width of your finger.


Thanks Stinkwheel - I'll take another look at doing it that way. Very Happy
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Robby
Dirty Old Man



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PostPosted: 09:43 - 06 Aug 2021    Post subject: Reply with quote

Or you could just start it. Nothing will get damaged. The trouble only creeps in when metal is hot, spinning fast, and running without oil.
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Polarbear
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PostPosted: 09:54 - 06 Aug 2021    Post subject: Reply with quote

Robby wrote:
Or you could just start it. Nothing will get damaged. The trouble only creeps in when metal is hot, spinning fast, and running without oil.


Absolutely. As long as you have decent oil in it , it will be fine and that's if it starts straight off. The chances are it will go a couple of revolutions before it fires so doing what you want anyway.

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droog
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PostPosted: 10:02 - 06 Aug 2021    Post subject: Reply with quote

Yeah, thanks Robby, Polarear. I'm probably being a little paranoid. I'll see how things go.
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WD Forte
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PostPosted: 13:14 - 06 Aug 2021    Post subject: Reply with quote

As said, just whip the plugs out and short the solenoid terminal with a screwdriver blade a few times to get the oil circulated.
Nothing will assplode.

I use a spare car battery and jump leads for similar purposes but the principle is the same.
On a rebuilt or long laid up motor, I usually spin it up until the oil light goes out a few times before firing up in anger then when it does start
dont rev the tits off it until it's started to warm up
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droog
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PostPosted: 16:36 - 06 Aug 2021    Post subject: Reply with quote

WD Forte wrote:
As said, just whip the plugs out and short the solenoid terminal with a screwdriver blade a few times to get the oil circulated.
Nothing will assplode.

I use a spare car battery and jump leads for similar purposes but the principle is the same.
On a rebuilt or long laid up motor, I usually spin it up until the oil light goes out a few times before firing up in anger then when it does start
dont rev the tits off it until it's started to warm up


Cheers WD Forte, excellent advice Very Happy
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Shaft
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PostPosted: 21:08 - 06 Aug 2021    Post subject: Reply with quote

Droog wrote:
Yeah, thanks Robby, Polarear. I'm probably being a little paranoid. I'll see how things go.


You need to watch a few resurrection vids on YooToob

https://www.youtube.com/watch?v=fhpA1uT8W28&t=9s isn't a bad place to start.

tl;dr Fires up car after 26 years in a field, throws some tyres on it and drives it 600 miles home.

After a life of running on modern oil, you might do some damage to your bike if it started instantly and you revved it straight to the limiter and held it there for half an hour...............








............but probably not.
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droog
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PostPosted: 10:24 - 07 Aug 2021    Post subject: Reply with quote

Shaft wrote:


You need to watch a few resurrection vids on YooToob

https://www.youtube.com/watch?v=fhpA1uT8W28&t=9s isn't a bad place to start.

tl;dr Fires up car after 26 years in a field, throws some tyres on it and drives it 600 miles home.



Ha! Thanks Shaft! yeah, that video defiinetly adds some perspective on how robust engines actually are.

I love these ressurection videos, watching some guy using his skill and know-how bringing back a 'long dead' machine to life is really satisfying.

It's great to see old, forgotten bikes, cars and trucks getting rescued like this. Very Happy
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