Best of NX250 / AX1 / XL250 Degree built

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scrambler
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Registriert: Fr Sep 14, 2012 8:50 am

Re: Best of NX250 / AX1 / XL250 Degree built

Beitrag von scrambler » Di Jun 23, 2020 7:40 am

I hope if you read this you will have done a shake down ride and come back with a big smile: D.
To be honest - after I turned off the engine after the first test run, I noticed the smell of gasoline. And wouldn't you know it - the carb was leaking. Looks like I screwed up. Oh well, metabolic end product happens :roll: .
I'm surprised the XL headlamp isn't DOT approved since it was sold in the UK for Orad use, but they have a different deflector
Honda has used these small headlights on many off-road bikes, e.g. also on the CRM250 https://www.cmsnl.com/honda-crm250r-199 ... vGUTudS9_I. But like the XL250 Degree, it was never officially imported to England. I don't know how that was done with the missing DOT. In any case, I couldn't find a DOT headlight even after an intensive search.

CRM250 headlight.jpg
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scrambler
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Re: Best of NX250 / AX1 / XL250 Degree built

Beitrag von scrambler » Mi Jun 24, 2020 8:09 am

One totally unnecessary carburetor removal later :roll: . The seal in the float chamber had hardened shortly after I overhauled the carb :)

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Add brake fluid and bleed

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No time for bolting on the tank shrouds - enavant to the first test drive. Of course, only across the fields - it still has no road approval.
Nothing drives as easily as a nixie :D

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Voilà - my first NX250 with a rear disc brake. It requires however a lot of force and gets hot - lets see if that can be remedied by cleaning the brake piston.

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jonathan
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Re: Best of NX250 / AX1 / XL250 Degree built

Beitrag von jonathan » Mo Jun 29, 2020 10:32 pm

great to see it finally up and running :D There's always a few teething troubles with a new build but the main thing is it starts, runs and rides OK. I usually throw a load of water on the disc and pads and do a couple of hard stops from low speed, then repeat the process about five times going a bit faster each time. The water stops the pads and rotor from glazing up if either has been replaced. Having said that, if it's running hot it does sound like it's dragging

Looks like you have some fine countryside to do your shakedown :D

I've ordered some rims for my AX1 but there's a five week lead time :( , plus the water pump oil seal and circlip I ordered from honda is on hold as the honda servers have been hijacked, apparently, so its now resting under a dust sheet until further notice :cry:

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scrambler
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Re: Best of NX250 / AX1 / XL250 Degree built

Beitrag von scrambler » Di Jun 30, 2020 8:20 am

Yes, everything is taking longer at the moment. If I can help with the spare parts let me know - I owe you a lower chain slider anyway ;) .
Speaking of overdue - finally the special screws for the shrouds have arrived. They are XL250 degree specific parts, M5 with 20mm head and only 5mm long thread. Couldn't find them anywhere until I found similar from the FMX650. On this occasion, I also ordered replacement turn signal glasses and rubber holders for the degree turn signals, as long as they are still available.

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When the brake piston was pushed out, parts of the dust seal were also pushed out - therefore cleaning the brake piston was not enough.

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The grooves of the seals must be cleaned, a lot of dirt collects there - which pushes the dust seal outwards and destroys it. Same problem as with the front brake. Thank god the same brake piston / seals as in the front brake of the NX250 are installed in the rear AX1 brake caliper. The procurement of spare parts was therefore not a problem.

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Off to the next test drive. The brake disc now runs smoothly and does not get hot anymore. However, the braking performance is still insufficient.

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Perhaps the brake pads still have to adapt to the used brake disc. Or the sintered metal gear pads are too hard. Since I am too impatient I have ordered a new EBC brake disc and organic EBC brake pads, let's see if that solves the problem. In any case, my AX1 decelerates much better.

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jonathan
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Re: Best of NX250 / AX1 / XL250 Degree built

Beitrag von jonathan » Mo Jul 06, 2020 1:43 am

pads are a funny one. I've tried organics on the transalp and they felt like cheese, but they work really well on the CB500 X. The Alp is quite a bit heavier so I reckon this is the reason. The other thing I noticed, on the KTM hub, I think the brake disc is normally on the left so the slots run back to front when fitted on the AX1. Can't see it making a great deal of difference, but you never know. Some KTM discs are just drilled so no directional slots.
If I spot any Degree bits and pieces, I'll let you know

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scrambler
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Re: Best of NX250 / AX1 / XL250 Degree built

Beitrag von scrambler » Sa Jul 11, 2020 6:58 am

jonathan hat geschrieben:
Mo Jul 06, 2020 1:43 am
on the KTM hub, I think the brake disc is normally on the left so the slots run back to front when fitted on the AX1. Can't see it making a great deal of difference, but you never know. Some KTM discs are just drilled so no directional slots.

Dang, you are right. How could I overlook that (how can one overlook a mountain - it's huge)? Unfortunately I had already ordered the brake disc - again with asymmetrical slots. At least the new EBC brake disc has a KBA number for the TüV (which the KTM disc didn't have). The first brake pads turned out to be semi-sintered - because that would likely only semi-solve my problem, I ordered pads again - from the UK. I couldn't find the organic ones in Germany.

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On the first test drive, the braking performance was almost zero - again. After a few violent attempts, the performance increased. It's still not great but decent. Possibly I have to buy a disk with symmetric holes. Or what else could be the reason? The brake caliper is overhauled, leaving only the foot brake cylinder that I could also take care of.

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But the test drives were fun anyway ;) Over 100km/h the Nixie got previously quite nervous, so I reduced the sag of the front fork with small additional springs.

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