C90 as winter hack

[Milo]

Where's that laughter coming from...

Right, i can buy one mot'd and insured for about £650, much cheaper than my GPz repair and insurance cost of about £1400 so I'm thinking of going for the cub.
it's a 1988 one which has done 40k miles.

I'd like comments, and some answers to these questions:

any idea how fast these things go?
can they cope with steep hills without sounding like a 50cc on speed?
can i keep up with a car from the lights?

Has anyone ever ridden one, what are they like. I've never ridden a ped/scooter, but the cub sounded good cos at least you can rev it between gears?

Thanks in advance
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[Robby]

top speed of 50, no matter how much loads you put on it.

the go on for ever, so mileage isn't important. chain and sprockets cost 12 quid in m&ps catalogue as i remember.

i dunno about off the light - they have similar performance to a 50cc scooter.

they have a centrifugal clutch and a gearbox AFAIK, so you still change gear but with no clutch lever.

[JimboJ]

you forgot that theyre ugly pieces of shit
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[Scotty]

yeh but for a winter hack there IDEAL!
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Regards
Scott

[Milo]

so they're the same speed as 50cc 2-stroke, or 50cc 4-stroke?
surely i could rev it upto the limiter then change into 1st for a quick "take-off"
do i give it some revs, put it in 1st then change up as i go or do i put it in 1st then give it some revs?
will it just sit there without any brake or revs in gear or would i have to put it into neutral?

I've heard of a 5-speed box for these before, anyone know of these or any other speed boosting tips?

[G]

I'd say better performance than a 50cc ped.. but I don't think I've ridden any 'decent' 50cc peds. The weird Gears realy confuse me (throttle off to change gear).
You could also consider a cg125 or similar.

If I remember someone fitted NOS to one, that'd boost the power a bit

[Scotty]

I had a blast on a mates one that he had for a while.
you just put it in first and give some revs and away you go.
to be honest i dont really like the way they work to be honest.
but they are definetly simple to use!
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Regards
Scott

[Milo]

Believe me, i'd rather have my GPz on the road, but i can't at the mo.
is it not possible to rev it high then switch to 1st, maybe for some (attempted) wheelie action?

[Robson]

Alright matey unfortunatly the way a centrifugal clutch works is its permanently set at a specific RPM once you pass that rpm the clutch will always engage due to the centrifugal force throwing the shoes out to the clutch drum creating grip thus driving the front sproket thats whats on my minimoto but its a fully ajustable clutch (doesnt kick in till 8,600rpm the way its set now)

Hope that makes sense
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Cheers

Paul (Robson)

[Robby]

they are 7 horsepower i think, and not exactly built for quic getaways. you cant really rev and change gear, you have to let the revs drop to change gear.

[Robson]

you may be able to get harder springs that need more force to force the clutch shoes out that will enable you to rev it higher before the clutch kicks in thus getting a faster take off minimoto ones may fit and would be worth a look mate at only £2 a set you cann really go wrong
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Cheers

Paul (Robson)

[G]

You dont need to mess about for wheelies though... 'tis really easy thanks to the realtivly tourquey 4 stroke and the short wheelbase.

[Robby]

it also weighs fuck all

[Doddmaster]

Thats far far too much money. It would be a good hack, but not at a price like that. Think about it, £650 for a 14-year old scooter.... not really. My GN250 only cost £400 and 10 years old. Just shop around a bit first

[G]

He did say insured... but then insurance shouldn't be more than £100 really.

[WildGoose]

i raced a C90 all the way up the edgeware road once (thats a long way) so i can comment on the performance,

i had an Aprilia SR50 one of the best 50cc peds around at the time, and i always took off ahead of the C90 at the lights, not by a huge margin, but enough to put me a few car lengths ahead, when i got to about 35 my ped runs out of steam for the crawl to 50, so at about 45 the C90 was caught up, and still had some power left to go, i think they will go to the happy side of 50, whereas regardless of the speedo on my ped i dont think it ever got over 50

so slightly less accel, cos of the 4t engine, but more top end cos of increased capacity, far less stable though cos the wheels are like bicycle tyres
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So in other words, he stopped you for being flagrantly in posession of a motorcycle in direct contravention of the Hippies, Darkies and People Whose Face I Don't Like The Look of (Police Powers) Act. 1976

[Robby]

actually they are meant to be far more stable than a scooter becuase they have normal diameter wheels, which makes them much more sure footed and less skittery.

[G]

The bigger diameter wheels should make it more stable but the narrower tyres will make it turn in quicker.

[Milo]

if i can afford it (should be able to, it's a 5 week month this month and i get paid on friday) i'll be getting it unless it's a complete dog.
I've only ever seen them for £800+ before, this one's £400, and insurance is about the £200-250 mark i think.
it won't let me change gear if i try to change at too hign a rpm though

Can it cope with a pillion and what kinda speed?

Thanks all for your help!
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[Robby]

they go about 50, no matter how much loads you put on them. i think they have vaguely low gearing, which helps.

they always cost a lot because cabbies snap them up to do the knowledge on, and loads of people want one for the back of the garage.

[Milo]

How about adding a little octane booster?

can anything simple be done to speed them up a bit, Dynojetting perhaps? (joke!)

[G]

Shop around for insurance... lots.. I was getting quoted £200 ish on average for the nsr.. some more some less. In the end I got two companies to 'fight' against each other and got it down to £99.

[kev]

i never thought i would have to tell you but i had one as my main bike for about a year you can rev them then dump the clutch all you have to do is hen you click the pedel forward into first you will feel it click into gear just keep it pushed down and you can rev the bollocks off it hen just take your foot off and the clutch engages and your in wheelie heaven but beware you tend to snap chains doing this
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[Milo]

heh heh
this is, i'm sure you're not 19 as you got insured on an NSR for £99
I've got a quick quote for 180ish TPO, but as the excess is half the value ofthe bike there's no point in getting TPFT.


sounds like fun, but i'll try it when i've got the cash going spare!

Do you get engine braking on scooters/mopeds?
surely you don't because the clutch would disengage if you left it idleing. but isn't it illigal to freewheel on a bike?

[G]

23
But that took quite a lot ringing around.