NX250 Thread -- official ADV owners manual

[Pete-NZ]

Originally Posted by Pete-NZ

Hi guys/gals...
i have a question..
did Honda ever make the NX or a bike very simular
useing the VT250 Vee twin engine...

It would have been a pre 1990 model..

why I ask is i once rode a NX style Honda..sure it had
a vee twin in it...

Pete

I think it could have been this

[larry31]

Firecat318

If temp's are warm and bike has been running within the last 1/2 hour, Sometimes longer, you may be able to start without choke. Most other times, you would need the choke to start. ( Cold Engine )

I hardly ever use the fuel shutoff during riding season, unless I don't think I'll be riding for more than a couple of weeks. Then I shut fuel off and run until engine uses up the fuel in carb.
Just remember to turn back on when you ride again.

Another common thing overlooked if the bike dosen't start, check the kill switch!
It can get turned off by accident, one of your friends or a passer by.

If bike isn't going to be run for a month or more, put Stabil in the gas tank. Good insurance!
Like mentioned in previous post, my 1990 NX has not had any carburator work since 1993, when I bought it with 3200 miles on it. A good testiment to proper storage practices.

[Huck369]

Originally Posted by Pete-NZ

I think it could have been this

What model is that pic of?

[Grestil]

I am the most recent proud owner of a slightly beat and mostly complete 1989 NX250. I've put about 1000 miles since I got it. I don't have any pics to post but I will post them when I get them. It wouldn't run without the choke when I bought it and was missing its skidplate but the rest of the pieces were there. Suspension was shot, headlight support tweaked, etc. Plastics have been broken and repaired by the previous owner. It's pretty decent looking up close other than paint on the frame and wear around the footpegs. Anyway, while experementing with jetting I got real tired removing and reinstalling the carb after the 8th time. After I found jetting I was happy with I had to tackle the idle mixture screw adjustment. I cheated a little. At work I have often used a piece of flexible tubing placed in a cordless variable speed drill to lap valves in cylinder heads. I used this trick to turn the mixture screw without disturbing the carb and with the engine running. First remove the vent tube from the left side of the carb. It's a short piece maybe 3 inches long that connects to a plastic T fitting on the other end. This tubing is the right size to slip over the mixture screw and if its still flexible enough can turn the screw. If the tubing is too flexible it will just twist up in knots but if it's kinda stiff it works great. Mine was too stiff and was flared on both ends so I trimmed it short, grabbed it with a pair of needlenose pliers, and pushed the shortened piece over the mixture screw head. I then used the pliers to rotate the tubing thus turning screw. I would imagine that this trick wouldn't work if the screw is too hard to turn or if the head is buggered up but it worked great for me.

[SaDoW]

how many turns for the right mixture?
2 ?
2.5?
3?

[Grestil]

3 turns out for mine. I'm running a #40 pilot jet, a #140 main jet and raised the needle 1/2 a clip position using a shim. Idle misture settings will vary based on jetting and other variables, So 3 turns out may not work for everybody.

[firecat318]

Originally Posted by larry31

Firecat318

If temp's are warm and bike has been running within the last 1/2 hour, Sometimes longer, you may be able to start without choke. Most other times, you would need the choke to start. ( Cold Engine )

I hardly ever use the fuel shutoff during riding season, unless I don't think I'll be riding for more than a couple of weeks. Then I shut fuel off and run until engine uses up the fuel in carb.
Just remember to turn back on when you ride again.

Another common thing overlooked if the bike dosen't start, check the kill switch!
It can get turned off by accident, one of your friends or a passer by.

If bike isn't going to be run for a month or more, put Stabil in the gas tank. Good insurance!
Like mentioned in previous post, my 1990 NX has not had any carburator work since 1993, when I bought it with 3200 miles on it. A good testiment to proper storage practices.

Thanks for the input! Yeah I believe my carb is fine because it idles very smoothly and has great power and acceleration after the engine is warmed up. I guess my problem is I haven't been using the choke even after it's been sitting a few days in the garage.. will start doing that now.

Another "problem" I've run into... my back tire needs replacing but the odd rim size on the NX250 makes finding tires difficult. Right now it has bridgestone tw40 tires on the back. What are the other tire options I have for the NX250 that come in the stock size?

[larry31]

Firecat318

Quote: "Another "problem" I've run into... my back tire needs replacing but the odd rim size on the NX250 makes finding tires difficult. Right now it has bridgestone tw40 tires on the back. What are the other tire options I have for the NX250 that come in the stock size? "

My 1989 NX had a "Duro HF904-51 130/90S-16 " on the back when I got it.
Seems to handle ok. I may put one on my 1990 NX next year when current tire will need replacing.

So far, I haven't found any sub's for stock front. ( Bridgestone TW-39 90/100-19 55P )
Stock rear (Bridgestone TW40 120/90-16 63P )

[RollingJ]

If you want a 80 dirt/ 20 street tire, a Kenda k760 trackmaster II is pretty aggressive. They come in 90/100x16 and 100/90x19.

If you want a 50/50 tire, the Shinko 244 a very good tire and comes in 3.00-16 and 2.75-19. It is also very inexpensive.

If you want a 20/80 tire, go with the tw40/tw39 combo. Those Trailwings are pretty good street tires.

[larry31]

After pulling my brush guard and seeing how dirty and chipped it gets, I decided to try to make something a little more durable.
Here's what I came up with, made from 1/16" aluminum sheet. It is bent so-as it does not touch plastic guard. At least it should protect the area directly behind the tire "kick-up"

I would have made it wider, but didn't have a wider piece of aluminum. Also, bending in two directions, I would have had to cut and bend more wierd angles. Will see how much it makes a difference. I may experiment with thicker aluminum and try different bending in future.

[ArthDuro]

great summary of the tire choices Joel
we should use this for a guide on the front page

Originally Posted by bastropjoel

If you want a 80 dirt/ 20 street tire, a Kenda k760 trackmaster II is pretty aggressive. They come in 90/100x16 and 100/90x19.

If you want a 50/50 tire, the Shinko 244 a very good tire and comes in 3.00-16 and 2.75-19. It is also very inexpensive.

If you want a 20/80 tire, go with the tw40/tw39 combo. Those Trailwings are pretty good street tires.

[firecat318]

Originally Posted by bastropjoel

If you want a 80 dirt/ 20 street tire, a Kenda k760 trackmaster II is pretty aggressive. They come in 90/100x16 and 100/90x19.

If you want a 50/50 tire, the Shinko 244 a very good tire and comes in 3.00-16 and 2.75-19. It is also very inexpensive.

If you want a 20/80 tire, go with the tw40/tw39 combo. Those Trailwings are pretty good street tires.

How long will the Bridgestone TW40 tire last riding on mostly pavement and not riding very aggressively? The current tire on my bike is pretty bald and the bike has 13,000 miles, I've only put on about 500 miles since I purchased the bike.

[larry31]

Originally Posted by firecat318

How long will the Bridgestone TW40 tire last riding on mostly pavement and not riding very aggressively? The current tire on my bike is pretty bald and the bike has 13,000 miles, I've only put on about 500 miles since I purchased the bike.

I've just over 6,000 miles on my TW40 in 2 years and 3 months. The front TW39 has much more thread with same milage.
Mostly road. 90% secondary paved 10% dirt and trail.
I like to ride between 30 and 55 MPH ( enjoying the scenery.)
I'm around 200 lb's and carry probably 10 - 20 lb's ( sometimes )

Here's what they look like now..

[thirstybuck]

Thanks for this post. I will probably pick up a set of shinkos.

Originally Posted by bastropjoel

If you want a 80 dirt/ 20 street tire, a Kenda k760 trackmaster II is pretty aggressive. They come in 90/100x16 and 100/90x19.

If you want a 50/50 tire, the Shinko 244 a very good tire and comes in 3.00-16 and 2.75-19. It is also very inexpensive.

If you want a 20/80 tire, go with the tw40/tw39 combo. Those Trailwings are pretty good street tires.

[firecat318]

Originally Posted by larry31

I've just over 6,000 miles on my TW40 in 2 years and 3 months. The front TW39 has much more thread with same milage.
Mostly road. 90% secondary paved 10% dirt and trail.
I like to ride between 30 and 55 MPH ( enjoying the scenery.)
I'm around 200 lb's and carry probably 10 - 20 lb's ( sometimes )

Here's what they look like now..

Thanks for the pictures and the mileage - when I purchased my NX250 used it had 12,500 miles on it. Since then I've put 500 miles on it and my rear tire is completely bald now. There is absolutely no tread left except for on the side part where it never touches the road. I've just ordered a new TW40 tire and it should be here in the next few days. My bike had a brand new TW39 front tire when I purchased it and so far it is showing little to no signs of wear. It almost leads me to believe that my rear TW40 tire had 13,000 miles on it