65cc metrakit magnum estoril leak

Pedro /

nightkidmk2

Apr 23, 2008 01:51AM

Hey bros,

I have a 1980 puch magnum mk2

I just bought and installed all my parts from treats

metrakit 65cc kit

estoril pipe

and i have an exhaust leak. i have the nuts torqued down at 7lbs and i don't want to go any harder and break the studs. the kit came with a gasket that has a flat metal circle on one side and a ribbed metal circle on the other end. I assume that because the metra cylinder has a little ridge on the exhaust side that the ribbed side of the gasket would go there and the flat metal side would go on the pipe side. Am i wrong? any suggestions?

thanks

Re: 65cc metrakit magnum estoril leak

) Cupermcnewbster ( /

boardmonger

Apr 23, 2008 01:57AM

Estorils seem to never line up properly. You might need to heat the header and bend it, or maybe enlarge the bracket hole so you can adjust it better.

Hold the rear of the exhaust and tighten the nuts and see how far off the bracket is. Thats how much to bend the pipe. I think all 5 puch estorils I've messed with didn't line up right.

Re: 65cc metrakit magnum estoril leak

Edward Richardson /

edward

Apr 23, 2008 02:14AM

Heres the deal, the studs that came w/ the kit are very garden variety tensile strength. Over tighten them and they snap, usually in the head. Pull off the cylinder, because removing the studs is going to take some serious torque with the vice grips. Don't go crazy and take out a fin, bite, 1/8 th inch twist and release, repeat. Purchase some allen head bolts (M6? Can't remember) of the correct length (not sure? buy several lengths and some washers lock and flat. These bolts are like Krytonite and resist vibrating loose.

Heres the other deal, your exhaust isn't mounted square. The cylinder and exhaust connection is primary and the connection to the bike is secondary. Have the pipe resting on something in aproximately the right area and get your cylinder and exhaust manifold seated, then figure out what you have to do to bracket it to the bike. If bolting it to the bike puts stress on the cylinder connection, somethings going to give and usually at a bad time.

Re: 65cc metrakit magnum estoril leak

Responsible Jon /

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philip

Apr 23, 2008 02:30AM

Sometimes a second gasket is all that is needed to get an estoril to stop leaking.

Re: 65cc metrakit magnum estoril leak

j /

mopedenthusiast

Apr 23, 2008 02:46AM

i haven't read the replies you've gotten, but i believe spec torque on puch exhaust bolts is 15 foot pounds, no?

Re: 65cc metrakit magnum estoril leak

buckswilde /

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brentl

Apr 23, 2008 09:36AM

Yeah, that's all I needed.

Re: 65cc metrakit magnum estoril leak

David Ciao /

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davidw

Apr 23, 2008 12:13PM

metra studs are cast into the kit.

Re: 65cc metrakit magnum estoril leak

buckswilde /

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brentl

Apr 23, 2008 01:31PM

mine aren't

Re: 65cc metrakit magnum estoril leak

Todd rod /

hotrodtodd

Apr 23, 2008 01:34PM

when I put the estoril on my metrakit I had to remove about a half inch on one fin on the kit that was in the way. I also had to heat up and bend the pipe a little bit to make it clear the peddels, but you may not have that problem on a magnum. Other than that it was easy to install.

Re: 65cc metrakit magnum estoril leak

David Ciao /

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davidw

Apr 23, 2008 02:53PM

crazy.

what did you use to heat up and bend your estoril?

Re: 65cc metrakit magnum estoril leak

) Cupermcnewbster ( /

boardmonger

Apr 23, 2008 03:29PM

Mapp gas. Gets really hot really fast.

Re: 65cc metrakit magnum estoril leak

Graham Motzing /

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grahammotzing

Apr 23, 2008 03:30PM

are you trying to bolt it to the stock magnum bracket, 'cause its in the wrong place, it needs to move down and over about an inch.

Re: 65cc metrakit magnum estoril leak

pedro /

nightkidmk2 OP

Apr 23, 2008 08:11PM

so I figured out that its not an exhaust leak, but exhaust leaking from the 5th hole on the metrakir cylinder in between the 2 bottom studs. The stock cylinder does not have this hole. What do I do with it? Plug it?

Re: 65cc metrakit magnum estoril leak

maciek /

macelius

Apr 23, 2008 08:16PM

that's the hole that would go to the decompression valve if you had one, your head/head gasket should seal it off if they don't have a decomp

Re: 65cc metrakit magnum estoril leak

pedro /

nightkidmk2 OP

Apr 23, 2008 08:24PM

the head gasket that came with it has a 5th hole on one side and if I turn it so the hole ok the gasket is on some other side the hole on the cylinder is only covered half way.

Re: 65cc metrakit magnum estoril leak

David Ciao /

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davidw

Apr 23, 2008 09:01PM

and then you just heat the shit out of the header and wear some thick gloves and bend it by hand?

i dont know how to do this

Re: 65cc metrakit magnum estoril leak

Brennan O. /

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brennano

Apr 23, 2008 09:17PM

David, I hit my header with heat while it was bolted to a FUCKED stock cylinder. The cylinder was in a table vice and had no where to go.

You will never get that pipe hot enough to bend it by hand. Put the header in a padded vice, or do it how i did it.

MOPED ARMY

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