Loncin RE250 6 speed

[JerryHawk250]

As Oneleggedrider stated. You can always swap the front sprocket to a 12 tooth.

[Mister104]

I brought my engine I bought in my suitcase and walked it right through customs.

[timcosby]

is the heal toe shifter welded on?

[Mister104]

No

[84convertablegt]

Got the 40 tooth sprocket installed. Please forgive the audio. My new GoPro 7 has a known issue with the audio at higher speeds. Don't buy a GoPro.
Anyway, my top speed is kind of disappointing. The bike is a lot more fun and responsive with the new engine but it realistically doesn't go any faster than the stock CG engine. Is the swap worth the time and money? I'll say maybe. It's definitely cool. With some more work and proper engine break in maybe in the spring I'll have better results. I still think I was lean, due to the 35' weather I was riding in. I did change out the 110 main jet to a 115, which helped a little. This thing still needs a few more horses to push me up to the 70mph mark. Thoughts are always welcome.

[Wild Dog]

What you posted, is one the reasons why i gave up on a Motorcycle that is equipped with the RE250, the max speed was barely higher than a CG.
I think if we want something that's actually faster than the CG230 we need to move to a chinese 250 DOHC setup.

About the GoPro i didn't knew they were having issues with speed and audio. I guess i will keep my hero 5 black for a bit longer.

[Megadan]

Originally Posted by Wild Dog

What you posted, is one the reasons why i gave up on a Motorcycle that is equipped with the RE250, the max speed was barely higher than a CG.
I think if we want something that's actually faster than the CG230 we need to move to a chinese 250 DOHC setup.

About the GoPro i didn't knew they were having issues with speed and audio. I guess i will keep my hero 5 black for a bit longer.

The appeal of the RE250 was never really about top speed. Performance wise they make close to the same power, so there never was going to be any big increase out of the box.

The appeal comes from the counter balancer (smoother) the OHC engine (More useable spread of RPM to work with) and the 6spd gearbox's 6th gear to allow the use of a shorter gear ratio with the sprockets to maintain off road capability while also having better highway gearing when needed.

The other appeal is the OHC engine has better hop-up potential if you decide to try and get a bit more power out of it.

In the end though, the basic reality is that it is still a 230cc-ish air cooled single.

I would do the same mods I did to my CG to said CB clones - ported head, increased compression, and a larger smooth bore carb. The RE can take advantage of the better breathing up top than even the CG without a cam. Toss in the possibility of cam changes and the CB again has the advantage of using two lobes vs. the CG engine's single lobe.

For what it is worth, even if you don't want to do any actual engine mods, I would highly suggest a PE30 or PWK30 carburetor paired to that engine. The difference might amaze you.

Also, as Jerry said, give it time to break in before you judge it too much. Many people complain about the lack of power on the Hawk's when they are new, and by 500 miles their opinion tends to change as the motor has finally seated the rings and "loosens up" a bit.

[Wild Dog]

Originally Posted by Megadan

The appeal of the RE250 was never really about top speed. Performance wise they make close to the same power, so there never was going to be any big increase out of the box.

The appeal comes from the counter balancer (smoother) the OHC engine (More useable spread of RPM to work with) and the 6spd gearbox's 6th gear to allow the use of a shorter gear ratio with the sprockets to maintain off road capability while also having better highway gearing when needed.

The other appeal is the OHC engine has better hop-up potential if you decide to try and get a bit more power out of it.

In the end though, the basic reality is that it is still a 230cc-ish air cooled single.

Everything you mention it's the same with a Chinese 250 DOHC

Even there is the 200 OHC that has the same output that the RE250, also 6 speed with plus that it is a direct drop in to the frame that hawk and brothers use.

It's in spanish, but nothing to hear, just the tear down of the engine.

At least from my point of view i was a bit disappointed with the RE250 i was expecting a bit more.
Can it be upgrade to perform much better? Sure, i even think that the RE250 with a fine tuning and mods can push the 70 mph without issues.

[Mister104]

I’ve had several CG bikes from a 150 to a 300 and the difference in power is negotiable. The OHC engines rev higher and produce a little more HP but again not much of a difference in top speed runs. 70mph seems to be the goal and the limit of these Chinese engines.

[Mister104]

My old cg150 can hang with my cg250 six speed.

[OneLeggedRider]

It's all about how far you're willing to go. I'm quite sure the RE can be made to produce alot more power than the CG, but it's gonna cost alot more than the initial price of the motor. In '95 I doubled the hp of a YSR 50 from 6.9 to 14.1 averaged from 3 consecutive dyno runs, it came apart on the 3rd run deceleration due to reusing piston clips, but at the track it's only gotta last 3 runs. Back to the RE, I wouldn't be surprised if 25hp was possible WITH enough work and money.

[cycleway4]

If you haven't seen this article before,..its an interesting read on the CG250 engine, and mods done to it, for building a land speed record bike......95.599 mph

https://www.rideapart.com/articles/2...00-motorcycle/

[Wild Dog]

Originally Posted by OneLeggedRider

I'm quite sure the RE can be made to produce alot more power than the CG, but it's gonna cost alot more than the initial price of the motor.
Back to the RE, I wouldn't be surprised if 25hp was possible WITH enough work and money.

I bet you can make it to reach 25 hp, with some work and some money. But still the Chinese 250 DOHC 4v stock (detuned) is 24 hp and it's the same base they use for the 300 dohc that's 31 hp.
That engine is not really much more expensive than the re250.

I guess i had set my hopes on the RE250 too high, because i really like the motorcicyle that comes with that engine.

[84convertablegt]

Originally Posted by Wild Dog

I guess i had set my hopes on the RE250 too high, because i really like the motorcicyle that comes with that engine.

I had higher hopes too. Honestly the power is good and it is much better than the stock CG throughout the RPMs, it just isn't enough. It's hard to explain.

[Wild Dog]

Originally Posted by 84convertablegt

I had higher hopes too. Honestly the power is good and it is much better than the stock CG throughout the RPMs, it just isn't enough. It's hard to explain.

I know exactly what you mean, i had the same feeling when i tried the motorcycle with the RE250. It's clearly better than a Stock cg230 but not enough.
Now i'm looking at this engine.



The motorcycle that use that engine, can cruise at 75 mph with a max speed 81 mph. That's stock

24 hp stock vs the 17,7 hp from the RE250. Even the 200 ohc i showed earlier is bit better than the RE250.