Mutt motorbikes leak petrol

[-]

[trevor saxe-coburg-gotha]

They should've put the off-set filler cap on the off bike's off-side, then - not the near-side (the side the bike leans to when on the side-stand). Is that one conclusion to draw from all this?
____________________
"Life is a sexually transmitted disease and the mortality rate is one hundred percent."

Mobylette Type 50 ---> Raleigh Grifter ---> Neval Minsk 125

[Petemate]

OP - you have my sympathy, but please look for the obvious remedy here. I've looked at the pics of the Mutts. Obvious to me that, with the filler on the right side of the tank, if the fill-up is performed with the bike on the side stand, petrol will overflow once the bike is upright. Therefore ideal to fill with it on the centre stand, or while astride the bike. (but some filling stations take a dim view of this procedure)

My bike has a central filler, and no overflow pipe. I always fill the tank with the bike on the side stand, also only up as far as the bottom of the 'neck' extension. When I first had the bike, I was putting too much petrol in, ie just above that neck extension, and the fuel would 'capillary' out through the vent in the cap. Tef will know what I mean, as I think my tank is fairly similar to thiose on a few of the bikes he is familiar with!

Persevere OP, and hopefully you will get to enjoy the bike.
____________________
82 not out....1983 Honda LA250 Custom
2008 Saab 9-3 1.9 Tid 150 Vector Sport estate
2005 Stirling Eccles Topaz 2-berth

[linuxyeti]

[grr666]

https://www.ebay.co.uk/itm/Universal-Motorcycle-Scooter-Kickstand-Side-Stand-Adjustable-Black-/173242648621

Put this on the other side, just for when you're filling up. Problem solved £6.86
____________________
Currently enjoying products from Ford, Mazda and Yamaha
Ste wrote: Avatars are fine, it's signatures that need turning off.

[dales1433]

My last bike was a Suzuki Bandit. I’ve rode bikes for a good few years and across different countries. Recently an R Nine T across Portugal, however, I’m not an expert and do respect the views of engineers and enthusiasts on here that are trying to help.

I purchased the 250 Mutt for a quick 5-minute ride to work each day. I agree I shouldn't have purchased Chinese and have learnt a lesson here. There isn’t a centre stand on these bikes and the fuel leak isn’t from the cap. I’m not an engineer but couldn’t find the source, but the RAC couldn’t find the source either, they could only confirm the fuel had leaked over the engine and traveled through the air cylinder. The RAC wouldn’t have taken the bike on the back of a flatbed truck for 1.5 hours if they could have quickly fixed the problem. From other research it seems maybe its the charcoal canister blocking which causes the bike to feel like it’s cutting out when trying to ride.

I also expected it should be an easy fix. A loose pipe ect.. The bike looks great in my view and was fun to ride… But I have a list of MOT firms that have responded to say this is an MOT failure, quoting 6.1.3 from the MOT testers manual.

[ThatDippyTwat]

[linuxyeti]

[pompousporcup...]

how does a leak from the overflow for the tank reach the inside of the engine?

[linuxyeti]

[May Bee]

Rode a mutt for over a year, never a single issue with the filler cap and found the folk in Birmingham extremely helpful with every query I had.

If you overfill a glass with water then walk with it at speed some will spill out. Are you from a rival brand or just daft as a brush?

[stinkwheel]

This is the third time I've asked what the dealer said about the problem.

You obviously joined this forum specifically to share your displeasure about the dealer and his product and have referred to them as "cowboys" yet more than one member of the forum has the opposite experience of them. I'd imagine it would be in both your and their interests to find the solution to whatever the problem is that you're having

Someone WILL ask them if you don't tell us. This forum gets very high results on google searches, if there is a problem with these bikes or the dealer, people need to know. Equally, if there is not a problem, they need to know that too.

It would be great if we could help you to fix and enjoy your motorcycle.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[pompousporcup...]

[stinkwheel]

If it's draining fuel into the airbox, it could be a vapour breather it's coming down.

If it was an older bike I'd wonder if there was a leaky float valve? However it'll be FI and I have only a very sketchy idea of how that works. Could a valve stick open in the fuel pump?
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[dales1433]

I appreciate it Stinkwheel. Nice of you to want to help resolve. For me I’ve decided the bike is unsafe and I picked up a car whilst I look for another bike. I’m contemplating between a Triump Street Twin or one of the Moto Guzzi V7’s or a V9 – Any advice or suggestions of similar bikes welcome so I pick up the right thing next time??

The Mutt was only 3 months old, 300 or so miles on the clock. Worn in correctly. It’s under warranty so went back to the dealer "on the wheel" which is also a service and MOT centre.

They checked over the bike and said there wasn’t any problems. I assume they checked the seals on the fuel pump and fuel sensor level, that the hose hadn’t become detached, or if there was a potential defect in the release pipe.

After they had communicated with Mutt, their response was there is nothing wrong with the bike. The “issue” was just that I overfilled. Mutt responded independently to say the same. That the manual tells you what will happen if you overfill. The manual doesn’t say what will happen but does provide a picture showing you should leave an inch when filling, which I thought I had when I filled it. I certainly didn’t brim the tank.

“On the wheel” at first told me they had 3 other Mutts back with the same problem and a memo from Mutt telling them something about this issue. When the sales team got back to me to say there’s no fault with the bike they claimed the person that had told me this was wrong.

It seemed like the petrol could have been leaking from what I assume is the carbon filter, or charcoal canister, but it also looked like the petrol could have leaked from another point as there was petrol on other parts of the engine.

I think the overflow in the tank is further down than they suggest in the manual, and therefore maybe the tank can take a significant amount more petrol than it can deal with. Maybe routing between the engine and swing arm is its issue and its just the volume it can’t handle. Either way Petrol exits the bike in an unsafe fashion and in substantial volumes. I think Mutt know there’s a problem with the bike and hope they can avoid this by people filling the tank half way or by two thirds max. Problem is people will buy these second hand in a few years and might not get the manual. They will fill it up and it will piss petrol near the engine casings and crate a puddle of petrol by their feet. I’m sure they could do something to resolve the issue, I actually expect they already are on the current bikes being made.

[2Hondas]

Have you considered riding it to the dealers with a can of petrol, and filling it up in front of them to demonstrate the problem?
____________________
Current - 2010 Kawasaki ER-6n - Green
Previous - 2000 Honda CB600F Hornet - Yellow
Previous - 2007 Yamaha YBR125 -Blue

[Wonko The Sane]

[suburban myth]

A contact tells me you need to call Mutt, and ask for a guy called Tyler Durden. He can help.

[cb1rocket]

post a video? demonstrate the problem?
____________________
Honda H100S2 Rebuild - https://www.bikechatforums.com/viewtopic.php?t=253852

[.Chris.]

[stirlinggaz]

Hi,
You obviously hate this "fault" & its put you off the bike for good.
I'll take it off your hands, faulty.
For the price of a "faulty bike".
Solution?

cheers,
GAZ