Complete Engine 125cc 4 Stroke 1P52FMI-K (124cm3) Dirt Bike Engine Motor Carb Complete Kit for Honda XR50 CRF50 XP CRF 50 70

Engine came way faster than expected. Easy to install, complete sistem, just add oil and go! This is for my son’s rzf 125cc and he said that the motor feels like it has more torque than the one that came on the bike.for us this motor works perfect (has about 2-3 hours on it since installed it).

I tried to give this company the time of day and cheaped out with their motor but it failed literally on the break in ride. The ball bearing in the kickstarter fell apart and got in between the gears in the transmission and cracked the case. The company also does not like to refund you your money back even if the motors under quality. Please just go on Tbolt or another site that sells better engines.

The engine arrived early from the seller. My 12-year-old son installed it and adapted the wiring in just a few hours. We converted his Apollo RFZ from a manual to this automatic and it’s much more powerful and fun. It started on the first kick. So far, so good!

Replaced my SSR I just got this year with one of these. This thing has a ton more power. Definitely do not recommend using the carb they send you as it is junk. Vm22 carb has brought this engine stock no sprocket upgrade nothing to around 47mph I weigh around 170. This thing is well worth it. Also invest in a new kicker for kick starting since the one they sense come lose and will strip out the grooves. (Trust me, not fun) 9/10 for price & performance. And it looks stunning.

Look, it’s a $300ish dollar engine. Usually they run good in a crf/xr 50/70 frame for about 2 years. This is the fourth one I’ve gone through the engine itself is strong, but the transmission fails after a while. Usually 3rd gear (2 years of use meaning I’d ride it at least twice a week around a small pit bike track) But I do keep buying them. It’s a great replacement engine after you blew up the pitter the first time.

Install very easy. Wiring simple for a Xr70. I have been running it for 2 months now on weekends with pitbike friends. I have not had a issue as of yet. Fired right up no problem. Runs very strong.

The engine was assembled wrong, It would not turn the crankshaft by using the kick starter. I sent video to the supplier and after several days (8) was reimbursed for the purchase... I would rather have had another engine sent to me but that was not an option. several e-mails from supplier to try different things but the fact is that it would not turn over the crankshaft and therefore will not start. Lost interest in trying to get the old 1970 Honda CT70 going again so set it on the back burner for now.

I gave it 3 stars due to the lack of wiring instructions. I wired for engine-only. I will work on charging later. The green 6 pin plug coming from the engine that matches the CDI is NOT for each other. The green plug coming from the engine is a gear indicator switch (you use this for finding neutral and even indicating 1 through 4). However, you need the plug itself so you have to cut that off and repurpose it for the CDI to your ignition. Google the pinout for the CDI and it's straightforward; one color scheme was almost identical to the engine wires. Coming from the engine: blue/white is the trigger, black/red is the AC. The black/yellow from the ign coil goes to the light green/red on the green connector. Red/blue is the killswitch (by grounding). Fired right up afterwards.