NSR mileage and rebuilds

[Blunet600]

whats the mileage of all you nsr owners? because mine is on 6500 atm and my sister wants it after me. and i intend to get an R6 in 2 years or so, and in 2 years my sister is old enough to ride it. but my dad reckons the bike will be shagged. so im curious to know whats the mileage of everyones NSR and how long have you had it. Also how much have people paid for rebuilds and other important mechanical changes to help keep the bike alive longer.
cheers.

[code guru]

mines a 99 regs and its got 18k miles but i fitted an 03 engine in may

[Handsome]

Mine's an '02 reg with just gone 7000 miles and I've had it just under two years.....Only work I've done on the bike is changed the pads all around and the front disc, changed the spark plug twice and sorted out a moody HT Lead.....
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Previous Bikes...Honda NSR 125 RR...Kawasaki Zephyr 550...Suzuki SV 1000 S...Yamaha FZ8...Current Bike...Suzuki GSX-R 750...

[mjt]

Mine is 2000 reg with 16500 km. Except brake pads and spark plug nothing was ever changed .... it is still working

[lee125]

mines a 93 model with 14000 miles and ive just rebuilt the top end cause it seized
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cbt passed 01/07/2006 bike:92 dt 125 and 96 honda cr 250
theory:PASSED! A2 test:PASSED 08/11/2006 restricted to 33bhp for 2 years

[kn76cbr]

1992 K reg owned 18months 5 previous owners 1 top end rebuild (by previous owner) and 1 gearbox rebuild (by me) 33'500 miles and i run it fully derestricted
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Crashing's proof that your trying

[moonym20]

hehehe

mine is a 2001 (new in 02) with 35,000 miles on the clock

fully derestricted and i have only ever (touch wood) replaced the piston rings and little end bearing (and that didn't even need doing)
the mechanic took the cylinder top of and removed the piston and the inside of the engine is as good as new

its a real testiment to Honda design, everything is in good nick and i keep it well greased and its only ever been run on fully synthetic oil and very carefully run in as well.

only ever changed tyres chain, sprockets, sparks and pads
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A scientist crossed a skunk with an owl. He's got a bird that smells but doesn't give a hoot

[ncrn]

mines on around 8500 miles now, i bought it at 7400 2 months ago, and had to replace tyres chain sprokets brake pads and indicators on front.

but thats only because the tyres had been used for burnouts, and the old chain had never ever ever ever been lubricated.

but now it is road legal and completely awsome

[alains]

just to remind for every NSR owner , every 7500 miles you need a complete de-carbonizing and :
- 7500 rings change (do not forget to read the barrel letter)
-15000 piston+rings change
-22500 top-end rebuild
note : each time you need to change piston pin,clips,small end bearing and seals&gasket
you could pass over this schedule n but at your own risk !
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the worst day fishing is better than the best day working

[code guru]

[alains]

if you are able to change your rings , you are able to de-carbonize your head , exhaust port, valves & axis
just note that the nut locking the valves axis is a left-hand thread (undo clockwise) and it's necessary to change the dust seal
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the worst day fishing is better than the best day working

[moonym20]

alains>>

i haven't stuck to that 'schedule' i have had a fully qualified honda mechanic work on my bike every time its in the shop.

the only thing i can say i have adhered too is de-carbonizing. everything is for my bike is off.

the only thing touched on my NSR as said above is the rings and little end bearing. nothing else has needed changing because its all in good nick. so i think IMHO the schedule won't apply to everyone
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A scientist crossed a skunk with an owl. He's got a bird that smells but doesn't give a hoot

[alains]

so , as you spent £80 for rings change , is it serious to do not add £5 to change the pin ?
do not do that and change all it's needed
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the worst day fishing is better than the best day working

[fuzz]

When you say top end rebuild, what extra is needed from the 15000 mile service?
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https://www.bikepics.com/members/fuzzbcf/
Bikes: '99 NSR125R, '00 SV650S, K1 GSX-R600, '97 CB500, K3 SV1000S, '16 VFR800

[moonym20]

I asked my mechanic to do what whatever needed doing, he took a good look at the engine (and had already ordered all the bits in anticipating a rebuild) and decided that at the moment the above mentioned were the only items that needed replacing everything else was in 'as good as new' condition.
its only a couplr of quid to have the clyinder head removed and get it all sorted should it need doing in the future
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A scientist crossed a skunk with an owl. He's got a bird that smells but doesn't give a hoot

[alains]

top-end rebuild needs barrel+piston kit , eventually valves & shaft and all other various parts
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the worst day fishing is better than the best day working

[fuzz]

So why then does the piston need replacing first at 15000 miles, but again only 7500 miles later?
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https://www.bikepics.com/members/fuzzbcf/
Bikes: '99 NSR125R, '00 SV650S, K1 GSX-R600, '97 CB500, K3 SV1000S, '16 VFR800

[alains]

because the piston goes with the barrel . you could buy a barrel only with the same letter as piston , but price is about the same buying a kit (barrel+piston) or a barrel only . why ? i do not know but some strange things are ...............
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the worst day fishing is better than the best day working

[ncrn]

[code guru]

[alains]

carbon is a deposit of burned oil mostly on combustion chamber and exhaust port . when it's too important it cause an overheating and a loss of power and sometimes a valves blockade . so this must be clean when the maker recommand to do it . about rings , old engines had cast iron barrel with steel rings , so the barrel wears more than the rings and need sometimes a re-bore . now the barrel are cast aluminium with a coat of very hard alloy (nikasil) and the rings wear more than the barrel . about the piston which is cast aluminium made , it wears less than the rings because it scrap less against the barrel as the rings do .
so trust me , if you want to avoid problems apply the schedule of maintenance . it's worse spending £100 and to be safe than spending nothing and having a broken engine which will cost you £300 . these NSR are the best 2 strokes and they will give to you what you will give to them
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the worst day fishing is better than the best day working

[moonym20]

very informative, however in my case, with only the rings and bearing replaced the engine is still in superb condition with no sign of defects.

also to the best of my knowlage as said by several people on here over the years gone by, most NSR (and other 2-stroke) owners simply get a new piston kit, this being, piston, piston rings, gudgeon pin and associated bearings. minus the barrel which by my understanding is only a requirement if it is infact damaged or scratched by somthing such as a broken or snapped piston ring.
its a testiment to Honda's engine along with the fact that if its fun on 100% synthetic oil the engine lasts longer.

when you refer to 'valves' i presume these are the reed valve and exhaust port valve (which is commonly prone to being filled with carbon deposits)
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A scientist crossed a skunk with an owl. He's got a bird that smells but doesn't give a hoot

[ncrn]

ok so how do I clean the carbon?, more specifically what is the cyclinder, head, valves? and where do I find these?

also what would I have to buy to replace the rings? I think I know what these are. Any ideas on costs?

i know thats a lot of questions, but if anyone can help it would be muchg appriciated.

[alains]

when i talk about valves i mean exhaust valves (RC/valves) the intake is reeds (membrane) . cleaning the head , top piston,valves and exhaust port need waterproof sandpaper size 180 and 400 with some elbow oil
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the worst day fishing is better than the best day working

[ncrn]