When a 20 minute job takes you all day - Page 4

SpudRider · 10-30-2010, 01:28 AM

Quote:

Originally Posted by mizke

ok oj im sure you are going to end up banned... i hate spammers

I got him, Mike. :twisted:

Spud

mizke · 10-30-2010, 03:56 AM

Quote:

Originally Posted by SpudRider

Quote:

Originally Posted by mizke

ok oj im sure you are going to end up banned... i hate spammers

I got him, Mike. :twisted:

Spud

*high five*

daddy469 · 11-08-2010, 09:21 AM

Since Pitster can't seem to give me a straight answer on getting the flywheel cover, it is back to "project: Project".

On a positive note (if there is one) it didn't break again the way I initially thought it did. The dog ear that broke off does NOT make contact with the rest of the block. Instead, the front chain/sprocket cover screws into IT which is a problem for two reasons. First, if you torque it down too tightly your bolt starts grinding on the block. And second it puts un-necessary pressure in an 'away from the block' fashion. Very poor design IMO.

So, plan on a thread revival! There will be more pics. I think I'm going to take it to a machine shop and get it zapped. The new threads I created in the dog ear are holding very well. It only needs to handle about 6ft lbs for that cover. I'm also going to look at using the stud method and see if I can washer shim the negative pressure off of the assembly.

Imagine with the bolt head sheared off.

UGH - I just remembered I'm out of gasket paper :?

Daddy 8)

katoranger · 11-08-2010, 10:16 AM

http://cgi.ebay.com/ebaymotors/88-89...Q5fAccessories

Take a look.

Weldangrind · 11-08-2010, 11:32 AM

Yep, save your JB Weld.

SpudRider · 11-08-2010, 12:15 PM

Quote:

Originally Posted by katoranger

http://cgi.ebay.com/ebaymotors/88-89-90-Honda-NX250-NX-250-Left-Engine-Crankcase-Cover-_W0QQcmdZViewItemQQhashZitem5ad4cd198aQQitemZ39011 7267850QQptZMotorcyclesQ5fPartsQ5fAccessories

Take a look.

Great find, Allen!

Daddy, since the NX250 was only imported into the U.S. for three years, you might want to offer the seller $40 for this item.

Spud

Oengus · 11-09-2010, 03:17 AM

You can buy that part new 567571
(198750-001) It's $122.00 from Bike Bandit.

http://www.bikebandit.com/houseofmot...62sch261#sch62

katoranger · 11-09-2010, 09:42 AM

At least we know its available. The ebay one is half the price and a used cover is just as good. Quick coat of paint and its ready.

I believe the likelihood of it fitting is pretty high. The nx250 looks to be a good cross reference for parts. Just like the tw is for zongs.

Oengus · 11-09-2010, 11:09 AM

The bottom half of the engine does seem to be from a Honda 250, but you have to wonder about the top half since itâ€™s a 400cc obviously not the same, is it just a ridiculously bored out 250? I think the 250 version that gets 25hp make much more sense then a 400cc that only gets 27hp. The XTR250 would it be the same engine top and bottom as the NX250 and not just half of it. The good thing is that the 250 lower case would not be over whelmed since the original Honda 250 it supported was rated for higher hp and torque then the 400. The big bore would explain the prioritization of the temperature gauge over the tachometer, I wonder how much bigger the case is over the original 250? It may just be a bored out 250 but thatâ€™s a big jump I would think they had to increase the case or the cylinder walls would be very thin.

I would think that Pitster should be able to provide a new cover and gasket for under $100.00 and either the XTR or Xingue part should fit it. The problem would be they likely would not stock them and they would have to order one from china and the price goes up then.

FastDoc · 11-09-2010, 12:05 PM

Quote:

Originally Posted by Oengus

The bottom half of the engine does seem to be from a Honda 250, but you have to wonder about the top half since itâ€™s a 400cc obviously not the same, is it just a ridiculously bored out 250? I think the 250 version that gets 25hp make much more sense then a 400cc that only gets 27hp. The XTR250 would it be the same engine top and bottom as the NX250 and not just half of it. The good thing is that the 250 lower case would not be over whelmed since the original Honda 250 it supported was rated for higher hp and torque then the 400. The big bore would explain the prioritization of the temperature gauge over the tachometer, I wonder how much bigger the case is over the original 250? It may just be a bored out 250 but thatâ€™s a big jump I would think they had to increase the case or the cylinder walls would be very thin.

I would think that Pitster should be able to provide a new cover and gasket for under $100.00 and either the XTR or Xingue part should fit it. The problem would be they likely would not stock them and they would have to order one from china and the price goes up then.

IF the 250 really was an NX250 I'd bite, but even the NX is an orphan. Imported for only 2 years many years ago. I wish the Chinese would clone an XR250 or 400 motor!

SpudRider · 11-09-2010, 12:22 PM

Quote:

Originally Posted by Oengus

The bottom half of the engine does seem to be from a Honda 250, but you have to wonder about the top half since itâ€™s a 400cc obviously not the same, is it just a ridiculously bored out 250?...

The top end of the LXT 400 engine appears to be a Rotax 400 cylinder.

http://chinariders.net/modules.php?n...wtopic&t=10831

Spud

Weldangrind · 11-10-2010, 01:30 AM

Spud, is that your observation, or did you find some data that pointed you in that direction? I'm asking because I'm an enthusiast, and I never would have thought of Rotax.

SpudRider · 11-10-2010, 01:41 AM

Quote:

Originally Posted by Weldangrind

Spud, is that your observation, or did you find some data that pointed you in that direction? I'm asking because I'm an enthusiast, and I never would have thought of Rotax.

I read several posts on the internet that indicated the cylinder, and cylinder head appeared to be Rotax. When I visited Pitster Pro in September, and test rode the LXT 400, I asked a lot of questions.

The folks at Pitster Pro verified the cylinder, and cylinder head were Chinese Rotax. 8) I don't own an LXT 400, so I can only compare photographs. However, based upon my research, the Xingyue, 400cc cylinder, and cylinder head appear to be taken from the current, Rotax, 400 EFI engine.

Spud

Weldangrind · 11-10-2010, 02:29 AM

That makes me wonder if the engine is actually 400cc. If the bottom end is stock XR250, the stroke is likely 59.5mm. If the cylinder is a stock Rotax 400, the bore is likely 91mm.

The formula I use is bore x bore x stroke x #of cylinders x 0.7854.

That gives us 386981 cubic mm, or 386.98cc. Who knows.

finnrider · 11-10-2010, 03:01 AM

When i ordered my bike about two years ago, they told me that motor has Rotax top end.
They also told that it is 387cc.

11-08-2010, 11:32 AM	#50
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Yep, save your JB Weld. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

11-10-2010, 01:30 AM	#57
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Spud, is that your observation, or did you find some data that pointed you in that direction? I'm asking because I'm an enthusiast, and I never would have thought of Rotax. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

11-10-2010, 02:29 AM	#59
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	That makes me wonder if the engine is actually 400cc. If the bottom end is stock XR250, the stroke is likely 59.5mm. If the cylinder is a stock Rotax 400, the bore is likely 91mm. The formula I use is bore x bore x stroke x #of cylinders x 0.7854. That gives us 386981 cubic mm, or 386.98cc. Who knows. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

11-08-2010, 09:21 AM	#48
daddy469 Join Date: Jun 2008 Posts: 293	Since Pitster can't seem to give me a straight answer on getting the flywheel cover, it is back to "project: Project". On a positive note (if there is one) it didn't break again the way I initially thought it did. The dog ear that broke off does NOT make contact with the rest of the block. Instead, the front chain/sprocket cover screws into IT which is a problem for two reasons. First, if you torque it down too tightly your bolt starts grinding on the block. And second it puts un-necessary pressure in an 'away from the block' fashion. Very poor design IMO. So, plan on a thread revival! There will be more pics. I think I'm going to take it to a machine shop and get it zapped. The new threads I created in the dog ear are holding very well. It only needs to handle about 6ft lbs for that cover. I'm also going to look at using the stud method and see if I can washer shim the negative pressure off of the assembly. Imagine with the bolt head sheared off. UGH - I just remembered I'm out of gasket paper :? Daddy 8)
	0

11-08-2010, 10:16 AM	#49
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	http://cgi.ebay.com/ebaymotors/88-89...Q5fAccessories Take a look.
	0

11-09-2010, 03:17 AM	#52
Oengus Join Date: Oct 2009 Posts: 826	You can buy that part new 567571 (198750-001) It's $122.00 from Bike Bandit. http://www.bikebandit.com/houseofmot...62sch261#sch62
	0

11-09-2010, 09:42 AM	#53
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	At least we know its available. The ebay one is half the price and a used cover is just as good. Quick coat of paint and its ready. I believe the likelihood of it fitting is pretty high. The nx250 looks to be a good cross reference for parts. Just like the tw is for zongs.
	0

11-09-2010, 11:09 AM	#54
Oengus Join Date: Oct 2009 Posts: 826	The bottom half of the engine does seem to be from a Honda 250, but you have to wonder about the top half since itâ€™s a 400cc obviously not the same, is it just a ridiculously bored out 250? I think the 250 version that gets 25hp make much more sense then a 400cc that only gets 27hp. The XTR250 would it be the same engine top and bottom as the NX250 and not just half of it. The good thing is that the 250 lower case would not be over whelmed since the original Honda 250 it supported was rated for higher hp and torque then the 400. The big bore would explain the prioritization of the temperature gauge over the tachometer, I wonder how much bigger the case is over the original 250? It may just be a bored out 250 but thatâ€™s a big jump I would think they had to increase the case or the cylinder walls would be very thin. I would think that Pitster should be able to provide a new cover and gasket for under $100.00 and either the XTR or Xingue part should fit it. The problem would be they likely would not stock them and they would have to order one from china and the price goes up then.
	0

11-10-2010, 03:01 AM	#60
finnrider Join Date: Sep 2010 Posts: 20	When i ordered my bike about two years ago, they told me that motor has Rotax top end. They also told that it is 387cc.
	0