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Discussion Starter · #1 ·
I recently purchased a lucky 7 mini moto from a friend for £30 and I'm going to build a ported engine (thanks cam2 for help) and going to restore it only have a few pictures but will get some up soon as on my phone now so what is the best exhaust that will fit the lucky 7 and is a stock exhaust mod better
Thankyou
Alex
 

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See my avatar Lucky 7 semi chopper, I had to make a side pipe, and put the foot pegs on the front axle. A Jet Pro and 7 other exhaust would not fit in the frame without major mods. I built it from parts and put C1 water cooled front forks. Best would be shorten your stock exh. headpipe 4" and add 4 or 5" of 2 1/2" to 2 7/8" truck exhaust extension to the middle of the bellyod it to fit your frame and weld your own pipe or take it to a muffler shop. Here is 2 I am working on and one I made for my 40cc Polini water cooled engine.
 

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20 gauge is pretty thin, but the China metal belly is thin too, use what you got. When I grind the different pieces to make the exhaust fit the frame I draw 2 line acrossed the joints on each side to line it up for welding. Then tack weld it together, see if it fits then weld it up. I got the 2 7/8" ID diesel truck pipe ext. at the auto store for $20, can make 3 or 4 pipes from it, and it's 12 ga. or something about .090" thick. I got some 1/4" 6061 T6 aircraft alum sheet pieces got to make 3 to 4" extenders between the rear arm and frame and move the rear wheel back. Then you buy a longer rear axle kit with with billet pegs for $20 from SP4less online, and put you feet back there.
I put 10 speed toe clips on my C1.
 

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Discussion Starter · #9 ·
Well alot of the bike has changed after my horrendously long absence sorry guys but anyway i have done a bit to the bike i have painted the farings a deep red and have also found some new wheels out of my supplys because the old valves were leaking on the old wheels i have also installed a rocket key to advace the timing and also a exhaust of a baby blata tell me what you guys think.


 

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Nice red paint, I hated that green. Should have got a red starter cover,lol. On a Lucky 7, better to mod your own exhaust. I tried 7 different pipes I have, none off the would fit in the narrow frame, I put a 5 port billet head hp engine I built in it w,front foot pegs and made an under pipe into a side pipe.
 

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If you leave the old paint on the frame, put a glove on your hand and a bunch of damp rags with acetone on them, lightly & quickly wipe the whole thing. It takes all the top oil and stuff off and leaves a primer finish. You can sand lighty if you like or even bondo the bad spots. Or use primer first, sand. On your finish color first coat light, you should still see a little of the primer. Then light coats 6 or 8.
 

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I like it, a reverse Polini GP3. On the Lucky 7 you can make 1/4" thick alum plate and make 2 pieces. You take the rear arms off mount our plates the frame rear then bolt the arms to the rear of the plate where you made 8mm holes. Can't find them anymore, the wheel moves back 2 inches and the frame raises. I am moving mine back 4" and the frame up two. Have the two alum pieces, 3M poster taped together to make both side at once.
 

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PBU use to sell sets for $37, I just missed out, so have to make my own.
4" long, the PBUs were 2" and raised the frame a little. They wheeliee cause you are sitting over the rear tire, that's why the lift kit.
 
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