Author Topic: Starting problems  (Read 842 times)

Robbi347

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Starting problems
« on: March 28, 2020, 01:51:45 AM »
Hi guys, hope you could shed some light for me. I’ve just fitted new crank seals etc and refitted engine. At the moment I can’t get it to start. I’m getting lots of backfires and it try’s to start on the left cylinder but it won’t catch. Carbs were fine before but I’ve cleaned them out and changed plugs. I believe I’ve put everything back as it should but is they’re something I’ve maybe missed that would cause this?  Hoping this is something simple, I’ve spent a fortune repairing and replating the cylinders already. Cheers

xstian

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Re: Starting problems
« Reply #1 on: March 28, 2020, 02:52:21 PM »
Sounds like carbs to me. It's quite easy to get a bit of dirt in there when taking them apart.
TZR 250 1KT

Robbi347

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Re: Starting problems
« Reply #2 on: March 28, 2020, 05:08:24 PM »
Thanks for the feed back , I’ll have another look at them. Hoping that’s all it is  (-P)

Robbi347

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Re: Starting problems
« Reply #3 on: March 28, 2020, 09:51:05 PM »
Anyone used the pattern coil from Yambits?  Any good?

xstian

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Re: Starting problems
« Reply #4 on: March 29, 2020, 10:11:57 AM »
I've never tried them. I'm sure someone has and can advise.

If you are getting backfires you must be getting a spark. Have you tested the coil?
TZR 250 1KT

Robbi347

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Re: Starting problems
« Reply #5 on: March 29, 2020, 12:35:14 PM »
I checked the coils and the primary’s ok but the secondary was out of spec. I took the caps off and the problem side wire is aged and brittle. I’m thinking the spark has been too weak so looking at a new coil

xstian

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Re: Starting problems
« Reply #6 on: March 29, 2020, 02:28:52 PM »
If it's just the HT lead brittle, you can unscrew them from the coil and replace them and the caps.
TZR 250 1KT

Rabr1

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Re: Starting problems
« Reply #7 on: April 02, 2020, 07:12:09 PM »
Have you checked your stator plate.is it set at the right markings.
Rab

Robbi347

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Re: Starting problems
« Reply #8 on: April 02, 2020, 07:43:37 PM »
Have you checked your stator plate.is it set at the right markings.

Hi, I didn’t think the tzr had marks? There’s no mention in the manual and the bolt holes aren’t slotted?

teezer250

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Re: Starting problems
« Reply #9 on: April 02, 2020, 08:14:06 PM »
Have you checked your stator plate.is it set at the right markings.
It has no markings and only fits one way,nothing adjustable.

Ron1

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Re: Starting problems
« Reply #10 on: April 03, 2020, 09:21:43 AM »
Mine wouldn't start after an engine rebuild (it was running well before the engine strip) I fitted new spark plugs it started straight away and still don't understand why the old spark plugs packed up.

teezer250

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Re: Starting problems
« Reply #11 on: April 03, 2020, 01:06:54 PM »
Could be excess/remains of 2t oil fouling the plugs up inside the central electrode area.

Robbi347

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Re: Starting problems
« Reply #12 on: April 03, 2020, 07:12:03 PM »
Could be excess/remains of 2t oil fouling the plugs up inside the central electrode area.

Tried new plugs, and it feels like it wants to fire and maybe a few more turns of the engine would help but obviously the kickstart only gives a couple of turns. The plugs get oily very quickly and I thought maybe the 2t pump was putting out too much but it hardly seems to push any out at tickover.

chubba

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Re: Starting problems
« Reply #13 on: April 03, 2020, 07:36:22 PM »
What about a quick squirt of carb cleaner in the air box, if it runs sort of rules out electrics. Not the safest of things but a couple of seconds running might point you in the right direction

teezer250

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Re: Starting problems
« Reply #14 on: April 03, 2020, 07:39:41 PM »
It won't put out a lot at tickover.
Make sure the pump marks align properly on full throttle,(engine off).
You may have excess oil in the lower case just sitting there and helping to overoil.
Put a bit of petrol down each plug hole and try starting that way to help the initial start-up.