Melted pipe

[Guest]

Hi folks. Bought a bike ( moto roma sk125) and rode home (40 miles ish) and got halfway back and noticed bit of blowing and backfire. Noticed a pipe melted (see pic) it melted at point of engine. It goes to the fuel tank. I replaced it with some air hose but it melted again. It was running fine with hose on.

https://photos.app.goo.gl/163nAShS2bLcc6R03

2 questions.

1 its obviously not fuel as it still rides sooooo

2 whats it for? And what should i use to fix it?

[TimR]

Vacuum or pressure hose to the fuel tank is my guess

[_amw_]

I don't know what it is. It could be some kind of air-injection type emissions thing, maybe...

However, given the bike works better with it not melted, I'd go for that option

It's right above the exhaust which is probably why it melted. If you can find some higher-temperature (silicone rubber?) hose then that will help. You could also stick some exhaust wrap around the top of the exhaust header to try and reduce the temperature of the outside.

[Mr Fro]

Yeah, looks like an emission control system.

Is it brand new or a second hander?

[TimR]

Pipe has been modified by looks of it

http://suprememotos.com/uploads/postfotos/moto-roma-sk-125-2.JPG

Perhaps using a heatshield or shielding wrap may help

[TimR]

Or spend a tenner on correct part

http://startright.co.uk/index.php?main_page=product_info&cPath=1720_441_1511&products_id=77955

[fastbob]

Yes , it's an emissions control device , not entirely sure how it works . It looks like yours has been messed with , the metal part should be a lot longer with only the top part made of rubber which explains why its melting. http://i.imgur.com/edtG0Hl.png this whole system is £10 second hand.

[Joeman]

It lets fresh air into the exhaust to dilute the gasses and make the emissions cleaner.

With it unblocked/leaking you'll get bangs and pops and possibly flames out of the exhaust. Block it up and all will be fine.