Brothers motorhispania rx50 won't start?

reed · Nearly there... Joined: 28 Oct 2012 Karma :

Hey people of the internet, a little while ago my younger brother turned 16 and got a motorhispania rx50 on a 2004 plate, he did his cbt a couple days ago and it has been running fine, but yesterday it decided to be gay and not start, I took the tank off and realised that the spark was jumping from the ht lead (just at the back of the ht cap) onto something else, therefor meaning the spark was not getting to the plug.

I then moved the ht lead away from any metal and straight away it ran again, leading me to believe it was a sparking issue, now however it has decided not to start again, I have just tried replacing both the spark plug and the ht cap with no joy, I have also checked the ht lead etc. And a spark is getting through. Also the plug gave a visible spark against the frame when I tested it.

Now I am stumped, it doesn't even sound like it's trying to start, when I attempt to bump start it, it just turns over, then when the clutch is pulled in it kind of coughs then cuts out.

Any ideas? I would be cry grateful. Smile

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Generic XOR 50, Gilera SMT 50, GSXR 400 GK73A, Ducati Monster 600, Honda Hornet 600.
Sold. Stolen. Written off. Sold. Current.

P. · Red Rocket Joined: 14 Feb 2008 Karma :

Clean the carb? Did you turn the fuel back on when you took the tank off Laughing

reed · Nearly there... Joined: 28 Oct 2012 Karma :

P. · Red Rocket Joined: 14 Feb 2008 Karma :

Ghetto, I like it Laughing

Would probably whip the plug out, give it a quick clean. Pop the carb off and clean the bowl out.

reed · Nearly there... Joined: 28 Oct 2012 Karma :

P. · Red Rocket Joined: 14 Feb 2008 Karma :

Not too hard really, remove it and just turn fuel off. Turn carb upside down and remove the screws holding the bowl on, clean bowl and unscrew jets, clean them and make sure they are clear.

Done Thumbs Up

reed · Nearly there... Joined: 28 Oct 2012 Karma :

Okay so far I have:

Replaced ht cap
Replaced spark plug
Taken the coil pack off to clean the earth wire
Checked for a spark which there is

I am confused as the problem before was definitely related to the lack of spark, a temporary solution fixed it, but now the exact same problem is back.

It doesn't seem like a carb issue to me, it was running absolutely fine before, and it has the same issues that it had when there was a lack of spark.

I may try taking the carb off. However I am not good when it comes to remembering how stuff goes back on. Crying or Very sad

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Generic XOR 50, Gilera SMT 50, GSXR 400 GK73A, Ducati Monster 600, Honda Hornet 600.
Sold. Stolen. Written off. Sold. Current.

bypass2 · Spanner Monkey Joined: 12 Sep 2013 Karma :

does it have a side stand switch if so maybe faulty.

iooi · Super Spammer Joined: 14 Jan 2007 Karma :

reed · Nearly there... Joined: 28 Oct 2012 Karma :

bypass2 · Spanner Monkey Joined: 12 Sep 2013 Karma :

what about the battery does it have to be fully charged

Ariel Badger · Super Spammer Joined: 02 Dec 2006 Karma :

Has it run out of fuel? Is the plug wet after trying to start it?
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Bikers make great organ donors, get 115 on your licence today.

reed · Nearly there... Joined: 28 Oct 2012 Karma :

reed · Nearly there... Joined: 28 Oct 2012 Karma :

mysterious_rider · World Chat Champion Joined: 11 Sep 2010 Karma :

maybe try spraying something flammable down the carb intake. Even deodorant if you have it. It does work... If it starts then you know its a carb related issue.

You've checked for a spark and it works, so the next thing to check is fueling. Wet plug you say? Well I'd still be taking the carb apart.

I had the rx50 (aprilia) And it managed to have a bent float needle which stopped it from running properly. Worth having a look inside. Clean the jets and the paths behind them with an airline. etc.
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reed · Nearly there... Joined: 28 Oct 2012 Karma :

P. · Red Rocket Joined: 14 Feb 2008 Karma :

Where abouts are you based? You don't look too far from me... I can probably take a look Laughing

reed · Nearly there... Joined: 28 Oct 2012 Karma :

P. · Red Rocket Joined: 14 Feb 2008 Karma :

Can possibly get over, don't suppose you can get it to Ashford Laughing

reed · Nearly there... Joined: 28 Oct 2012 Karma :

- · Super Spammer Joined: 22 Oct 2013 Karma :

Sorry, newbie first post....

If the HT lead was arcing out to another metal object, there's clearly something wrong with the lead.

I've got an old Shogun which refused to start one evening. You could see the leads arcing out to the engine block. Swapped the leads and it's been fine ever since.

Chopping the end off the lead wont really help. If it's arcing out, the insulation isn't doing it's job. Was the lead soaking wet when it was arcing out?

You can buy HT lead for a couple of quid a metre on Evil bay...

https://www.ebay.co.uk/sch/i.html?_trksid=p2050601.m570.l1311.R2.TR10.TRC0.A0.Xht+lead&_nkw=motorcycle+ht+lead&_sacat=0&_from=R40

When I changed it on my 2 stroke race bike, I had to pop the plastic snap connectors to open up the bit of the coil where the lead fits. I sealed the leads in with a bit of silicone sealant just to make sure it was waterproof.

reed · Nearly there... Joined: 28 Oct 2012 Karma :

- · Super Spammer Joined: 22 Oct 2013 Karma :

bypass2 · Spanner Monkey Joined: 12 Sep 2013 Karma :

does any of the electrics work. maybe a fuse /bad earth. is the plug sparking allright now.

reed · Nearly there... Joined: 28 Oct 2012 Karma :