Cleaning the exhaust

[longmoreuk]

Can anyone help me please. I am generally just tidying up my mk3 so I have changed the oil, topped up the 2 stroke, fixed a few issues with brakes etc but after riding it a few times I found I am slightly disappointed with the performance. Its not too bad, I just thought it would be a bit quicker off the mark.

Now- i don't really know that much of its history but I keep hearing about the exhaust possibly being full of gunk and general crud/carbon and this may be affecting it - so I have taken it off. Its dented and needs paint too so i intend to have a go at that aswell.

So my questions for those of you who have tried this before.

1) for the front pipe, whats the best way to decoke it. I have searched youtube etc but want to know someones experience.

2) As for the rear silencer - can i decoke that? I cant open it up but i assume it has wadding in there doesn't it? Does this mean i just have to leave that as it is?

3) anyone know of a decent paint to use to tart the front pipe up a bit, its in a sorry state.

4) I know the paint will add at least 5bhp to the bike but will decoking the exhaust have any affect? lets assume it is a bit grimey.

[twistednuts]

You probably wouldnt notice the difference after the exhaust has been de-coked, unless its mega cacked up, but its probably not.
Granville pot black is a great paint for the exhaust, seems to keep its colour.

[longmoreuk]

Probably wont but now its off I may aswell crack on with it.

[Eddie Evans]

What the trials lads are doing is pouring a bit of petrol in and setting it on fire
I would use a very long match ha ha


I have just used this paint to spray the exhaust on a Fantic I have been rebuilding. It sprayed really well. Loads of passes left 10 min then repeated.
http://www.ebay.co.uk/itm/Fast-Black-Ma ... 5d3f381f20
Ive just started the bike for the first time today so will soon know if it lasts. Would have liked a satin or gloss finish but that is only good to 300 deg.

[longmoreuk]

Not sure re pouring petrol in, sounds a bit extreme ! Are these trials lads still alive, and do they have eyebrows?

[fallenmikethebike]

Propane burner gun.Slightly more civilised
Mike

[pudzie83]

set it on fire and admire the jet style flame that pops out for safety reasons stand well back and wear goggles,hard hat,gloves,boots and kevlar suit

[Eddie Evans]

Yes I was a bit wary of petrol but gave it a go.
Built a bonfire, poured a bit of petrol in the chamber and silencer swilling it around then threw the pipes into the fire.
I could see flames coming out of the ends but nothing drastic.
Once they were done and cooled I used a wire brush in a drill to clean the old paint off.
I am very pleased with the finished results.

I'll give the propane gun a go next time unless a buy one of those flame throwers in the mean time.

[twistednuts]

I used to clean exhausts like this.

Fill with petrol, swill then empty it out. Only lit it for the crack after.

Dont really think it did much cleaning, get rids of a bit of 2 stroke gum but thats about it

[longmoreuk]

funnel +petrol+ propane burner = Fire.

I then added a compressor into the mix when it all got nice and warm and things got very interesting. Recommend it to anyone with an interest in Jet thrust propulsion!

Does anyone know if I should do the same with the silencer or will it ruin it? I don't know if there is any wadding in it for example.

I am not even sure if the silencer is just the standard item, it has Honda stamped one side and Goshi on the other.

[knackeredMk1]

Post a picture. If the original it might explode. If aftermarket they can be taken apart, cleaned an the fibreglass wadding replaced.

[longmoreuk]

ahh ok will try and post a picture later. Maybe it is original then as it isn't riveted etc, its welded up so to open would be a cut and reweld job - way too much work.

[longmoreuk]

[longmoreuk]

cam anyone tell me if that is the original silencer please.

[knackeredMk1]

Yes it is.