2013 Honda 450 starting issues

NeedMoto
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NeedMoto
Scenario's...

When bike sits for more than a couple of weeks, it's a 50/50 whether it will start. When it does start from being cold and sitting, it will fire off in a couple of kicks. If it doesn't fire in a couple kicks, then it won't start, and slight smell of gas. Then when I bump start it, it fires off immediately. Then the rest of the day it start's first kick, runs like a champ.

If I start it every few day's, there's no issues. This would be the easy fix I guess, just not always around.

The 50/50 ratio whether it start's or not is very frustrating, cause then I don't even know if I'm taking it out.

Always run VPR, or T-4 race gas. Has Vortex ignition, FMF pipe, ported head, and a fly wheel weight.

Capacitor, fuel injector, Vortex setting (rich maybe) what's your thoughts?

Thanks for any help!

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mxb2
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mxb2 2/26/2017 11:51am
2/26/2017 11:51am
Are you doing the same starting method each time?, Hrs on motor?
NeedMoto
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NeedMoto 2/26/2017 12:45pm
2/26/2017 12:45pm
mxb2 wrote:
Are you doing the same starting method each time?, Hrs on motor?
Yes... same starting method. 35 hrs since rebuild.

Thanks!
mxb2
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mxb2 2/26/2017 1:00pm
2/26/2017 1:00pm
mxb2 wrote:
Are you doing the same starting method each time?, Hrs on motor?
NeedMoto wrote:
Yes... same starting method. 35 hrs since rebuild.

Thanks!
Valves in spec?,. Try some new fresh fuel?
NeedMoto
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NeedMoto 2/26/2017 1:10pm
2/26/2017 1:10pm
mxb2 wrote:
Are you doing the same starting method each time?, Hrs on motor?
NeedMoto wrote:
Yes... same starting method. 35 hrs since rebuild.

Thanks!
mxb2 wrote:
Valves in spec?,. Try some new fresh fuel?
Valves are good, new fuel as well. Oil changes every 2 hours, new filter every ride.

I'm fairly anal with maintenanceWink

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nascarnate326 2/26/2017 2:06pm
2/26/2017 2:06pm
My 250 does the same thing. Ive had it to the dealer for the valves and they are in spec. Bike runs perfect but starts terribly. Im thinking it needs the top end redone Sad

I will say, if I give it a "bitch kick" it has a much better chance of starting than if I give it the hard abrupt CR500 kick.
mxb2
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mxb2 2/26/2017 2:14pm
2/26/2017 2:14pm
NeedMoto wrote:
Yes... same starting method. 35 hrs since rebuild.

Thanks!
mxb2 wrote:
Valves in spec?,. Try some new fresh fuel?
NeedMoto wrote:
Valves are good, new fuel as well. Oil changes every 2 hours, new filter every ride.

I'm fairly anal with maintenanceWink
Keep us posted on what you find.
NeedMoto
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NeedMoto 2/26/2017 3:34pm
2/26/2017 3:34pm
Paw Paw 271 wrote:
Try cleaning the fuel injector.

Paw Paw
cjmx wrote:
could also be a dirty fuel filter. Best to filter your fuel on EFI bikes if you're using pump gas.

I use this.
http://www.split-stream.com/products/splitstream-fuel-filter-honda-crf-…
I use race gas 100% of the time, although using a filter could help as well.

These intermittent problems are never easy to chase down.

Guess it's time I start using my 17 as my primary bike, and start going through the 13 Wink

Thanks everyone for your input. I'll keep you posted with what I find.
FGR01
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FGR01 2/26/2017 3:38pm
2/26/2017 3:38pm
Do you still have the stock ECM so you could throw it on temporarily to eliminate the Vortex as a prob?
NeedMoto
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NeedMoto 2/26/2017 3:41pm
2/26/2017 3:41pm
FGR01 wrote:
Do you still have the stock ECM so you could throw it on temporarily to eliminate the Vortex as a prob?
I do still have it, and will give that a try.

Thanks!
mxb2
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mxb2 2/26/2017 3:41pm
2/26/2017 3:41pm
Paw Paw 271 wrote:
Try cleaning the fuel injector.

Paw Paw
cjmx wrote:
could also be a dirty fuel filter. Best to filter your fuel on EFI bikes if you're using pump gas.

I use this.
http://www.split-stream.com/products/splitstream-fuel-filter-honda-crf-…
NeedMoto wrote:
I use race gas 100% of the time, although using a filter could help as well. These intermittent problems are never easy to chase down. Guess...
I use race gas 100% of the time, although using a filter could help as well.

These intermittent problems are never easy to chase down.

Guess it's time I start using my 17 as my primary bike, and start going through the 13 Wink

Thanks everyone for your input. I'll keep you posted with what I find.
Splitstream filters also for gas tank.
Italo00
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Italo00 2/27/2017 5:52am
2/27/2017 5:52am
It seems that when the fuel is getting stuck in the ducts, so the bike will have been too much in the start, the fuel pump does not seem to be sealing the fuel line when the bike is stopped
Paw Paw 271
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Paw Paw 271 2/27/2017 6:06am
2/27/2017 6:06am
Again, a dirty fuel injector will allow the fuel to leak when the engine is stopped. This can happen every time or at random. On the earliest Honda fuel injection systems this was a big problem. The injector can also go bad and leak.
May I suggest a fuel sock for your fuel tank. You may want to pull the fuel pump and filter and take a look at it.

Paw Paw

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