starting the bike

hi im looking at a 1982 yamaha seca 650 its my friends and he crasht it.well its rideble but to start the bike you have to hold the start button in for like 5 to 10 sec and some times you have to turn the key off and on because it wont start it hazitates but it does start just not right away does any one know what the problem would be thank you ivan

 

Pull the plugs, what do they look like? This should be your first effort.
I'd yank and clean out the carbs as a matter of course.
Make sure the choke and throttle cable aren't kinked somewhere along their routing path.

 

Did it behave the same before he crashed it?
Any obvious signs of damage?
Does it backfire while trying to start it?
Does it run ok when started?

 

hi thank you for responding i think the problem is electric whan you get it started the bike runs good and it does not back fire,whan you try to start the bike you hold the start button in and nothing hapens and than she turns over and starts right up,some times you need to turn the key off and back on to get it to start ut you always have to holdthe button in for like 5 to 10 sec for it to go.any ideas, thank you ivan

 

does any one have any idea what i should look for

 

Dirty contacts in the starter button, or poor connectors in the starting circuit wiring, or bad connections in the fuse box.

Could even be problems in the electrical connections in the ignition switch. When you turn the key on does the tail light come on, will the signal lights work if you turn them on, or will the horn honk?

Low battery voltage? When you press the start button do you hear any noise or clicking?

I would be checking all the connections and testing voltages.

 

I had a problem kinda like that.
I'd push the start button several times to get any cranking.
I ordered a new button, and that didn't help.
After tightening all the connections, it still did the same thing.
Next I held the start button and tapped the start relay with a screwdriver and bingo.
After destroying the relay, pulling it apart, I saw the problem.
The contacts were way beyond pitted, they looked like they had tried to weld together at some point.
So anyway, a new relay did the trick.
For good measure, I replaced the starter brushes also.
Although they probably were OK.

 

This is a problem with the STARTER.
The Starter needs a 100% -- BOTH Ends -- Overhaul and Cleaning.

I think you'll find the Planet Gears and everything on that end is caked with old, dead, grease.
You need to return this end to clean and greased with waterproof synthetic.

The Electric end is going to be Ugly as Sin.
The whole thing needs to get sprayed clean and lubed-up nice going back together.
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Do it yourself:

Here's my Starter write-up.

Pull the starter. Clean the heck out of it.

After you get it on the bench ...

Two long screws hold BOTH indexed ends to the main body.

Remove the gear end and COMPLETELY clean and re-lube that end.
You'll need to spread one Circlip to get the Planet Main Shaft out.
Keep track of washers and spacers.
Look on the ends of the shaft and inside the housing for thin Thrust Washers that like to stay stuck where they are.

Keep everything in order as you disassemble the Planet end.
Two small Planet Gears on opposed shafts.
The Ring Gear and Main Shaft.
Every Spacer and Thrust Washer.

Clean the "Whole-works" of the "Business-end." All of it so nice and clean a Marine Drill Instructor would have the Company check-out yours as good example.

Check for washers and thrust washers hiding on shafts and bearing ports.

Clean the Electric end; too.

Pull the Case away from the Motor -- slowly.
There's NO slack in the wire connecting the Brushes to the External Power Post.
Slip the Brushes off the Commutator.
Look for a Thrust washer - inside the Case - surrounding the port for the case bearing bushing.

With the starter exploded. Clean.
Use straight Isopropyl Alcohol loaded into a sprayer that has the Stream or Spray option.
("Honey, did you see the Windex. I can't seem to find it.")

Withdraw the Armature.
Spray everything until its completely clean and what you are spraying ON is as clean as what is dripping OFF!

Shoot the Commutator, Brushes, Brush Housing, Electrical Lead and the inside of the Electric end Case. Clean.

Shoot WD-40 on the CLEAN windings and magnets.

Lube the whole-works as you reassemble the Starter.

Using Top Quality Synthetic Waterproof Grease:
Everything and every surface on the Planet - Business End - gets lubed as it's reassembled.
Shafts, shaft bushing ID's, washers, spacers, gears, pivots, bushings, etc.
Grease everything. Either liberally -- for function, or smeared-on for both rotational forces on it ... or, to hold it from slipping as you reinsert bearing shafts into bushed port on the case.

Spin the Planet Shaft after its re-clipped in and grease the rotating Planet Gears -- "On the Fly" ... as they rotate around the inside of the Ring Gear.

Lightly smear washers and spacers on the Electric End ... but, don't allow the grease to contaminate electric connections and Commutator.

Get a dab of grease into the port on the Electric end; and smear the end of the shaft which fits there.

Now, the fun and games of getting the Brushes lifted onto the Commutator and everything lined-up and back together begin.

It's like a Chinese Puzzle.

Only ... "Made in Japan" !