I have a 1987 MC 16 , the bike runs well and pulls hard in lower gears up to 3rd - 4th , seems to run out of fuel in up top gears , have checked wiring , hoses , filter , plugs etc , the manual I have says the main jet with the flat slide carbs should be a #128 , from what I can read on the jet it is a #110 , I am thinking this could be the problem . Any thoughts or input is appreciated .
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A.Johnston

my bike is the same to 3rd i think its down to the programing on the control unit, i striped mine down but i cant change the program till i have a spare to play with. The chips is a standard chip they used from the 70's thru to the 80's in most things. probly need to change the rc valve setting to make a difference. anyone got any information on wer to get the control unit is it the same as the 125's.

ive got plenty of experience tuning the nsr 125 and my old one produced more power at the back wheel than the mc16 does now so would be intrested in knowing any similarities between the two.

when im accelerating on the mc16 if i accelerate to quickly its does seem to die no matter what gear im in but only if i accelerat fast.

hmmm

There is no way a NSR125 makes more power than an MC16. If it does then there is something wrong with the '16.

A stock MC16 will make around 45hp as shown here



The only things that hold the '16 back are the poor exhaust ports, crank cases internals and the 28mm carbs (the carbs dont holding them back that much mind). If those 3 things were delt with a '16 will produce around 58-60hp
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If I have to take the carbs off once more...

the nsr is 33bhp standard without the plate and washer in the exhaust

in never dyno'd after performing sum magic on it but took the top from indicated 110mph to 120ish on the dual carriage way.

but yer i was exagerating a bit but on a 125 two stroke you can produce about 45hp which is wat i was getting at. so i should think i could get more from the mc16.

anyone got anyideas wer to find the extras on this modle.

thank al

p.s mines was ""borrowed"" and hit a tree so it being rebuilt at the moment so anyone got any ideas of what i can do to it as im not used to two t strokes.

lol 33bhp at the crank pin maybe, never seen one over 25rwhp myself.

Dead easy to get 45hp from a 125 eh Matt?
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If I have to take the carbs off once more...

so if i put a mc18 engine (barrels) in then i'll have 58hp

Nope. Its alittle more involved that slapping barrels on things.
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If I have to take the carbs off once more...

yes i was talking from the crank

you would also need to fit the 18's exhausts and carbs and start from there.
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Harley Davidson is the worlds most efficient way to turn petrol into noise without the harmful side effect of horsepower.

any sujestions on the fuel starvation?

whats wrong with the carbs? the mc18 seem alot of work to setup how is the 18's exhaust different are they straighter than the 16's im bidding on sum tyga pipes so hopfully that will help i dont want to much power increase as i want to keep it more reliable being a low mileage 1987 mc16. can i use delortos of a nsr125 or similar 125cc engine as i am more comfortable setting these up maybe a 30mm, how would this effect the fueling would i need to remove the two bottles from the settup or can i use a couple Yamah carbs and bottles from say a dt125 or 250 or sorts.

whats up with the crank internals? is there a larger volume inside the 16 than the other models? i have previously tuned 2s engines by reducing the crank volume by fitting plates to the crank ect but i wouldnt know wer to start on this engine. im more intrested in optimising what i can from the current engine by playing with the carb and exhaust.

who said it was easy to get 45hp from a 125 btw? i stick to what i can get for free.

You're seriously over-complicating things.

Why would you want to use a pait of 125 Dellorto's? Why would you want to use Yamaha carbs and "boost" bottles?

If you have so much tuning experience with the NSR125, then surely you can just "look" at an MC16 and see what needs doing!

All the parts to make an MC16 go that little bit better are available as virtually direct "bolt-ons" (essentially turning it into an MC18 RJ motor), and there's no reason why the motor won't keep its current level of reliability if the work is done properly.

This sounds just like another thread started about 6 weeks ago. Go search for it and read what was said there.

What is it with you (ex) 125 owners? We try to keep an open mind here, but you all live in a daydream! There's no place for "exaggeration" when someone is asking for genuine advice. Telling them the motor should make 33hp while neglecting to mention this is (allegedly) crank hp is just not on - neither is telling grown-ups that an NSR125 will do 120mph.

WAKE UP!
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Andy.
NSR-WORLD.COM

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i'm saying nowt

whats is up with you guys.

i havent just owned a nsr125 for one ive had a few racing style reps aswell as proper racers and ive tuned old bikes with my mate who races bantams 125's ducati's aeromachis in Manx Grand Prix and VMCC.

im sure if u can make a pre 1950's with 3 gears bike do in excess of 100mph

i havent got much in the way money so thats why im looking for ideas and ive found it easier to create power using delorto the nsr has bottles on the inlet to lenghen the inlet so if i change the carberation i need to consider using a settup thats allready settup for them as this will make it easier setup.

and im not an ex 125 owner i still have 125's and ive got smaller 2 strokes that ive tuned aswell such as my 1980's mz50 (which is a 30mph moped that ive tuned to do 55mph just by inserting a cone in the exhaust).

also i dont like at the back wheel quotes for power as the dynos ive used in the past are at the crank and you have to take into account that the chain sprocket maybe worn bearing in wheels ect when running perfect mey be 10-5% but in real life with worn parts and its probly much higher.

i exagerate bassed on what i have done on better bikes such as my (pre harley) 1985 cagiva c9 125cc i had that had been tuned from standard and i had been clocked to 125+ and 39hp on the dyno. the nsr being a new bike should be capable of somthing similar.

sorry i cant help not being a grownup somtimes when surounded by people only intrested in being unplesent.

rules

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Honda nc23 CBR400 AERO 1986, 1990 honda NC23 Tri-Arm, 1987VFR400 NC24 Rothmans Rep, NSR250 MC16 1987, CL250s 1983. Moto guzzi zigolo 110cc 1958. Fantic 50cc 1972. Suzuki Cobra Race bike 500cc 2t 1975 , GP125 1975. Triumph T110 1954. BSA Thunderbird 1955. Ariel VB 600 1952, 1990 MuZ 125 etz.