Took a plunge... trying a PP LXR250 EFI - Page 31

Megadan · 05-28-2018, 12:29 PM

Quote:

Originally Posted by ChondaChondaChonda

In all honesty I'd love to see it go to someone like you that will carry on with finding cool ways to make little improvements and sharing them with us all!

Yeah, but we know it's worth more than what I have to spend. I was just having a little fun. Plus I would need another 700 bucks just to ship it here. I would love nothing more than to get my hands on that beauty of a bike though. Especially with the upgrades.

GlennR · 05-28-2018, 02:55 PM

This bike belongs in the Barber museum. It's the first domino of the Chinese bikes toppling the Euro dominance.

Duckati · 05-28-2018, 04:41 PM

Quote:

Originally Posted by ChondaChondaChonda

Which leaves me with the question of what to do with the LXR...

If you do end up making the plunge, I'd be seriously interested. Bought my RX-3 from the most active guy on that thread from advrider who did *mucho* farkling on his example, soooooo... why not do that again and carry the torch on a DS, just as I'm contemplating with an old college bud (who also happens to be an amazing fabricator/engineer at a very well-known local custom MC shop) about doing an epic multi-state trail trip together this fall?

chadzu · 05-29-2018, 04:49 PM

I jummped with Roostre this time. These new GPX bikes are very well made. With Roostre's LXR you could still point to a few things and say "look at the Chineesium". That is all gone on the GPX. I installed the 283 BB all ready, now to start working on a stroker crank. I think 315cc is doable........

GlennR · 05-30-2018, 07:19 AM

Quote:

Originally Posted by chadzu

I jummped with Roostre this time. These new GPX bikes are very well made. With Roostre's LXR you could still point to a few things and say "look at the Chineesium". That is all gone on the GPX. I installed the 283 BB all ready, now to start working on a stroker crank. I think 315cc is doable........

There's a 450 on the way.

chadzu · 05-30-2018, 08:28 AM

Quote:

Originally Posted by GlennR

There's a 450 on the way.

I'm sure the 450 will be great, but its not for me. I will trade the power increase for the increased range of the 250.

GlennR · 05-30-2018, 09:46 AM

That's a good point. What is the range of the NC250 with a 4-gallon tank anyway?

I'm wanting the 450 as a supermoto, which should be a lot more capable on the street with the extra cc's.

ChondaChondaChonda · 05-30-2018, 10:10 AM

Quote:

Originally Posted by GlennR

That's a good point. What is the range of the NC250 with a 4-gallon tank anyway?

I'm wanting the 450 as a supermoto, which should be a lot more capable on the street with the extra cc's.

Conservatively 160 miles. In reality I've done over 200 between fills. (North Fork, Idaho to Elk City, Idaho via the the Magruder Corridor. And I'm 100% sure I could have made it to Kooskia if I needed to.

2LZ · 05-30-2018, 10:17 AM

I think the range on the NC250 is quite excellent. I can go to the bar and back at least 14 times before the light comes on and i have to steel mower gas.

ChondaChondaChonda · 05-30-2018, 10:42 AM

Quote:

Originally Posted by 2LZ

I think the range on the NC250 is quite excellent. I can go to the bar and back at least 14 times before the light comes on and i have to steel mower gas.

Wow!

I wish mine could do that!

Megadan · 05-30-2018, 12:00 PM

Quote:

Originally Posted by chadzu

I'm sure the 450 will be great, but its not for me. I will trade the power increase for the increased range of the 250.

I think you will come to find that the 450 and 250 will have close to the same range on the pavement. 250's might be smaller engines, but they also have to work much harder to maintain higher speeds than a 450, which with nearly double the power is barely breaking a sweat.

On the trail, that would change. Then the 450 will start to show it's heavier drinking habit.

450's are also not for the faint of heart or inexperienced when doing trail riding. The extra power, especially the torque down low, require much finer throttle controls. Get it even just a little bit wrong and a 450 will let you know it.

ChondaChondaChonda · 06-09-2018, 10:28 AM

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ChondaChondaChonda · 06-12-2018, 12:24 AM

So I decided to move the Rekluse from the LXR to the GPX. As you can see I had both patients side by side and was able to examine the similarities and differences quite closely. While I was in there I put new oil pump drive gears (nylon) in as a preventative maintenance item that I plan to do annually.

Old gears under clutch basket - looking a little brown:

New and old side by side:

No need to tear the side-cover off - you can get both gears out and back in easily.

New gears installed in LXR motor! New owner should be good for another few years. Replacement gears are less than $15, so it is cheap insurance.

ChondaChondaChonda · 06-12-2018, 12:30 AM

Here is a shot of the GPX with the clutch cover off:

First thing I noticed was that the clutch pack was almost to the end of the basket fingers:

They also used a machined aluminum step washer in place of the old steel washers on the clutch springs:

The throw out bearing and push rods are identical in every way:

LXR top

ChondaChondaChonda · 06-12-2018, 12:36 AM

The height of the LXR clutch basket always puzzled me. It was too tall for the 6 clutch pack it came with, but 7 was a bit too thick. Looks like the NC250 design has been modified to make this less of an issue. The new part is probably a bit lighter as well.

LXR on the left - 2018 GPX NC250 on the right:

LXR:

GPX:

05-30-2018, 10:17 AM	#459
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,092	I think the range on the NC250 is quite excellent. I can go to the bar and back at least 14 times before the light comes on and i have to steel mower gas. __________________ "Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350
	1

06-09-2018, 10:28 AM	#462
ChondaChondaChonda Join Date: Oct 2016 Posts: 547	Patients are prepped for surgery... __________________ 1993 CR125 powered by Zongshen 223cc OHC 2̶0̶1̶6̶ ̶L̶X̶R̶ ̶2̶5̶0̶ ̶E̶F̶I̶ ̶ Sold 2018 GPX Moto FSE250R 1993 Fantic Key-Roo 250
	4

06-12-2018, 12:24 AM	#463
ChondaChondaChonda Join Date: Oct 2016 Posts: 547	Rekluse removal, oil pump gear change So I decided to move the Rekluse from the LXR to the GPX. As you can see I had both patients side by side and was able to examine the similarities and differences quite closely. While I was in there I put new oil pump drive gears (nylon) in as a preventative maintenance item that I plan to do annually. Old gears under clutch basket - looking a little brown: New and old side by side: No need to tear the side-cover off - you can get both gears out and back in easily. New gears installed in LXR motor! New owner should be good for another few years. Replacement gears are less than $15, so it is cheap insurance. __________________ 1993 CR125 powered by Zongshen 223cc OHC 2̶0̶1̶6̶ ̶L̶X̶R̶ ̶2̶5̶0̶ ̶E̶F̶I̶ ̶ Sold 2018 GPX Moto FSE250R 1993 Fantic Key-Roo 250
	3

06-12-2018, 12:30 AM	#464
ChondaChondaChonda Join Date: Oct 2016 Posts: 547	Clutch differences and similarities Here is a shot of the GPX with the clutch cover off: First thing I noticed was that the clutch pack was almost to the end of the basket fingers: They also used a machined aluminum step washer in place of the old steel washers on the clutch springs: The throw out bearing and push rods are identical in every way: LXR top __________________ 1993 CR125 powered by Zongshen 223cc OHC 2̶0̶1̶6̶ ̶L̶X̶R̶ ̶2̶5̶0̶ ̶E̶F̶I̶ ̶ Sold 2018 GPX Moto FSE250R 1993 Fantic Key-Roo 250
	2

06-12-2018, 12:36 AM	#465
ChondaChondaChonda Join Date: Oct 2016 Posts: 547	Clutch baskets The height of the LXR clutch basket always puzzled me. It was too tall for the 6 clutch pack it came with, but 7 was a bit too thick. Looks like the NC250 design has been modified to make this less of an issue. The new part is probably a bit lighter as well. LXR on the left - 2018 GPX NC250 on the right: LXR: GPX: __________________ 1993 CR125 powered by Zongshen 223cc OHC 2̶0̶1̶6̶ ̶L̶X̶R̶ ̶2̶5̶0̶ ̶E̶F̶I̶ ̶ Sold 2018 GPX Moto FSE250R 1993 Fantic Key-Roo 250
	3

05-28-2018, 02:55 PM	#452
GlennR Join Date: Oct 2013 Location: Boone, NC Posts: 187	This bike belongs in the Barber museum. It's the first domino of the Chinese bikes toppling the Euro dominance.
	5

05-29-2018, 04:49 PM	#454
chadzu Join Date: Feb 2018 Posts: 11	I jummped with Roostre this time. These new GPX bikes are very well made. With Roostre's LXR you could still point to a few things and say "look at the Chineesium". That is all gone on the GPX. I installed the 283 BB all ready, now to start working on a stroker crank. I think 315cc is doable........
	3

05-30-2018, 09:46 AM	#457
GlennR Join Date: Oct 2013 Location: Boone, NC Posts: 187	That's a good point. What is the range of the NC250 with a 4-gallon tank anyway? I'm wanting the 450 as a supermoto, which should be a lot more capable on the street with the extra cc's.
	1