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That's the plug info I needed. Thanks. I might go for a Mikuni carb replacement and a jet kit.

My Lifan 125cc semi engine did not come with a spark plug. What is the best brand and part number to use? It will be for normal riding use with the stock carb shipped with the engine.

Ordered the top triple clamp plate and the BMX bars. Great fit and finish. I'm not going stock, so this is a great addition to my bike. I feel it's worth the 140 bucks. At least for me.

Has anybody tried the TB Parts HONDA Z50 Z50R ADULT BMX HANDLEBARS & TRIPLE CLAMP SET? How about the TB Parts HONDA Z50 Performance Exhaust Carbon Fiber Can Z 50 TBW1243? My bike is a 1969 Z50 hardtail. Thanks

Non stock is ok. I will go for a nice looking 28mm exhaust and silencer system that fits. Does the Lifan 125 semi engine take a different size header gasket than for a stock engine?

Sounds good. Thank you for the installation tips.

Is there some adjustment to the TB Performance Exhaust that you mentioned (other than the mounting strap) to fit the bigger Chinese engines? (Like my Lifan 125cc semi auto) *Thank you for the Chinese cylinder measurements.

That one looks like it will work. How much bigger and where is the Lifan engine bigger than a 50cc stock engine? I don't have a stock engine to compare with the Lifan. I assume the cylinder is longer/wider. Thanks for the recommendation.

I'm using a 1969 K1 frame with a semi 125 Lifan. What are my exhaust system choices with this engine/frame combination? What companies should I look at and which of their complete exhaust parts packages will fit and work best? Thanks.

Thanks for the information. That's just what I needed.

I have a Z50A K1 with a Lifan 125. I'm going to order a new style knurled foot peg and kick stand unit. What length kick stand is appropriate for a 1969-70, hard tail Z50 K1? What is the stock kick stand length? I've seen 9" and 12" sizes for sale.

Nibbi throttles look great, and I may get one. They also make slanted air filters. Thanks for the tip.

I got my Lifan 125cc semi engine. Very quick shipping. Another question. This engine will use a 22mm carb. Can I run the stock 1969 z50 throttle setup, or should I go with a standard dirt bike type throttle? I hear there may not be enough throttle travel using the stock throttle.

I'm only doing this build because I have a frame. (Rolling frame, as of yesterday) And it sounds like a fun/different project. If I want fast, I have several 82-84 KTM 495's for that. 60 MPH on a bike this small does sound "exhilarating". I'm still going to do it anyway. LOL.

I have been looking at some of the special parts I will need for the bigger engine. Like the slanted air cleaner. Also, the foot pegs bracket is available for the 125. I won't be using any lights, so it will be an easier to install the electrics. I mainly want to see what the 125 will feel like...

Hi; I'm new to Mini Trails. (I usually build and restore 82-84 KTM 495's) I've had a 69 z50 frame for years, and I think it's time to build a nice z50 with some non stock modifications, like the engine. What are my main concerns with putting a 125cc Lifan into my bike? It will be a semi-auto...