Help needed! MC19 Honda CBR250R

[sn1tzr]

Hey guys,

Need some help with my bike! Bought a tidy MC19 at the start of summer while down in Christchurch (I live in wellington) rode it around for a week or so no worries. Left the bike at my parents and returned to Christchurch a few weeks later to ride the bike up to Wgtn. However after about 20 minutes of riding the bike looses all power and then will not restart until its cooled.



Wasn't going to risk riding it up the coast and getting stuck in the middle of nowhere so took it to a mechanic who told me the Carb was well worn and would need new needles and slides. The told me they would order them for me from Japan however many weeks later i have been informed they cannot order them for me and there is basically nothing more they can do for me.

So, i want to know if anyone knows anywhere i can find new parts for MC19 carbies? or if its worth tracking down a second had carb? Bit of a frustrating situation being that the bike is 500kms away, I just want a working bike! If anyone has any knowledge or advice that would be much appreciated!!

Cheers!
Rowan.

[Asher]

This looks like my mates old bike.
Your symptoms sound like a fuel starvation issue.
Check the tank breather, fuel lines and filters for blockages

[sn1tzr]

This looks like my mates old bike.
Your symptoms sound like a fuel starvation issue.
Check the tank breather, fuel lines and filters for blockages

Will check those again but the guys at the bike shop took the carb out and apparently its visibly worn inside. Seems a little strange to me but i'm not a mechanic.

[Murray]

Give Malcolm at Econohonda in Te Aroha a call

Failing this, this company may be your only option. It was the only place I could get carb parts for a GB400

http://www.nrp-carbs.co.uk/

[Pumba]

If your carb is "worn" (and it very well may be) that wont be the cause of the issue as to why the bike stopped after 20min of running.

I personally feel you are looking at a fuel starvation issue, or an electrical component breaking down as it gets hot. What was the bike doing imediatly before it stoped? Was there a slow decrease in peformance of the 20min it was running? How long do you have to wait for it to "cool down" bvefore it will restart.

In saying that having a nice clean carb wont cause any issues, neither will new needles and slides if you still want to go down that route.

[sn1tzr]

If your carb is "worn" (and it very well may be) that wont be the cause of the issue as to why the bike stopped after 20min of running.

I personally feel you are looking at a fuel starvation issue, or an electrical component breaking down as it gets hot. What was the bike doing immediately before it stopped? Was there a slow decrease in performance of the 20min it was running? How long do you have to wait for it to "cool down" bvefore it will restart.

In saying that having a nice clean carb wont cause any issues, neither will new needles and slides if you still want to go down that route.

Thanks, yeah it didn't sound quite right to me either. Bike run's great until it feels like it is running out of fuel (first time it happened i thought that was the problem). It wasn't really a slow decrease it was more a sudden power drop. Then it wont restart for another 10 - 20 minutes. The guys at superior motorcycles Christchurch were adamant it was the carb and said they had had the same issue before on similar 4 cylinder bikes.

[sn1tzr]

Give Malcolm at Econohonda in Te Aroha a call

Failing this, this company may be your only option. It was the only place I could get carb parts for a GB400

http://www.nrp-carbs.co.uk/

Cheers! Just gave Malcolm a ring. He might have some needles and slides for me

[Asher]

To me it doesn't sound like worn carbs are the issue, if the bike was a bitch to start cold, was dropping a cylinder or didn't have much power it would point to it but not suddenly stopping.

It sounds like something is blocking the flow to all 4 carbs.
As an example. When I first brought my rgv it would die after around 5mins of open road riding but would start back up after a few mins.
I eventually tracked it down to a fuel filter that restricted the flow enough that the carbs would run dry, after a few minutes the float bowls filled back up and I could start it again.

[unstuck]

If it was working fine before you parked it up, I cannot imagine the carbs would have worn out sitting around for a few weeks. Check for fuel starvation like others have suggested.

[Pumba]

Sounds like a starvation issue, but once the bike stops it wouldnt take 10-20min to resolve, that feels more electrical to me. But diagnostics by internet can be hit and miss.

[Asher]

Sounds like a starvation issue, but once the bike stops it wouldnt take 10-20min to resolve, that feels more electrical to me. But diagnostics by internet can be hit and miss.

A blocked breather may mean the tank takes awhile to pull air into it.
It could be a coil breaking down but I would have thought the bike could continue to run on 2 cylinders (albeit poorly).

[nzspokes]

Im gunna say blocked breather. Very easy test is to run the bike untill it fails then quickly open the fuel cap and see if it picks up again.If it does its a blocked breather.

[Tazz]

Thanks, yeah it didn't sound quite right to me either. Bike run's great until it feels like it is running out of fuel (first time it happened i thought that was the problem). It wasn't really a slow decrease it was more a sudden power drop. Then it wont restart for another 10 - 20 minutes. The guys at superior motorcycles Christchurch were adamant it was the carb and said they had had the same issue before on similar 4 cylinder bikes.

Cheers! Just gave Malcolm a ring. He might have some needles and slides for me

The same guys that have told you that also couldn't track down parts that you just have...(with a bit of help but someone in the trade should know where to go....) therefore I wouldn't be holding anything they have to say in high regard unfortunately
Start your diagnosis with a clean slate regarding the advice you're getting on here.

If you want give me a yell when you fang up with it through Picton. I have an MC22 at the mo and am always keen for a blat.

[FJRider]

If it was working fine before you parked it up, I cannot imagine the carbs would have worn out sitting around for a few weeks. Check for fuel starvation like others have suggested.

A blocked fuel filter (even a line kink) may cause that problem. Fuel flow not keeping up with engine requirements at higher revs.

Maybe ... all the crud in the fuel tank has settled around the filter on (above) the fuel tap ... and/or ... on start up ... said crud has flowed through to the carbs/jets. (I assume it has a vacuum fuel system)

1: Remove fuel line from the tank and check flow (tap set to prime) Tap removal and clean may help.

2: Drain carbs with fuel tap off. when fuel flow stops ... set tap to prime and flush.

[Monsterbishi]

It will be a fuel issue - Check that your fuel pump is running (MC19's had a in-tank pump) and that the fuel line isn't kinked, also check to see if the inline fuel filter is full of fuel with no air - they airlock very easily.

If your pump isn't running check the pump relay first - they have a nasty habit of falling off! (really!)