Is Polini a good belt? stock NB50

[trudeau1111]

i see on ebay for $30.........supposed to increase performance a little.

[Wheelman-111]

Greetings:

Polini belts are as good as Bando products, perhaps a bit better. $30 is a good price. Do me a favor and measure with a tape around the belt. Post results compared to stock circumference.

[ktvAERO]

are the 83-84 nb50 belts the same as the 85-87 belts?

[Wheelman-111]

Greetings:

This is from failing Wheel-memory, but I seem to recall the '83-84 belts being a lot narrower than the 15.5mm '85-later items. I'm almost certain they're nowhere even close to fitting.

[paulpauly7]

the belt im running measures 17mm wide

[trudeau1111]

OK, just got new Polini belt. it measures:
65mm outer curcumference
15mm wide

i do know that my existing belt on my NB50 is at the service minimum width of 14mm

hopefully this new belt will help some.

[Wheelman-111]

Greetings:

Quoth the Former Prime Minister:

OK, just got new Polini belt. it measures:
65mm outer curcumference
15mm wide

I hope you meant 65 Centimeters, or 650mm. Otherwise that's one short belt!
Nominal length of stock belts is 641, but I've never measured any belt that wasn't 8-12mm longer than this inscrutable Oriental way of representing the effective belt length at some arbitrary center point. Compare Polini's circumference to your stocker. The P may be just a bit longer too.

As for width, it should help the top speed a bit, but I'm confused. I don't recall my own Polini S belts being less than the stock width, which should be 15.5. Are you measuring with a caliper or "Purt' Near"? Either your number's off, the belt is worn, or Polini has a different use in mind for this one with a Polini vario and different pulley boss.

Try it out anyway and let us know?

[trudeau1111]

Sorry, you are right. it is 65cm (650mm)
but the width is bout 15mm (measured with a stainless scale)

[trudeau1111]

OK, update. i put on the new Polini belt and removed the cover and grease from the vari............according to our altima speedo, it runs between 43 and 45 mph. huge improvement over stock.

[Bear45-70]

The '83-'84 belt is different but it is available from Honda still.

BELT, DRIVE 23100-GJ8-000 (replaces 23100-GE8-004) $26.45

FYI the '85 belt is different from the '86-'87

'85 = BELT, DRIVE 23100-GN2-003 $38.42

'86-'87 = BELT, DRIVE 23100-GG2-751 (replaces 23100-GR1-003) $37.13

[trudeau1111]

Ok, so would you guys be satisfied with the performance of this Aero ?

[Bear45-70]

Ok, so would you guys be satisfied with the performance of this Aero ?

Yes, but remember Honda speedometers are known for their optimistic readings, 43 indicated on my Aero 80 is actually 40.3 mph. A GPS is the only correct way to check you speed.

[Wheelman-111]

Greetings:

Bone-stock '87 NB50 Aero Flash.0 struggled up to 38mph Indicated when first resurrected. 43-45 on the speedo is a very healthy AF05! Speedometer "optimistism" error is by no means unique to Honda scooters. ALL manufacturers with the possible exception of Harley-Davidson (!) build in anywhere from 5% to 12% (Twelve Percent!!) error for reasons about which we can only speculate.

[trudeau1111]

OK, good info. according to our Altima, i'm averaging about 43mph. but i shall check with a GPS. i'm pretty happy with the results though. thanks to a lot of help from this forum.
bought this thing for $160 with carb/airbox missing, and a few other problems. got it all tuned up and serviced now, and painted. got about $400 into it total.....including a manual.

[Wheelman-111]

Greetings:

Even most cars have a 2% OPTIMISTIC speedometer, or so says Garmin-Girl whenever I run it in the Family Truckster or most rental cars I've driven.