Nsr engine problem

[nsr125.98]

When I accelerate hard my engine is stuttering and jolts. It seems to be getting worse and my rev counter has a mind of its own. Its also backfiring and popping. Any Ideas as to why its doing this,as it getting dangerous when I pull out of junctions now.any help greatly appreciated
Gary

[mr jamez]

I would check the timing, could possibly be a fault in the ignition system as it is backfiring and popping. Reed valve might be buggered?

Change the spark plug first though.

[nsr125.98]

I changed the plug and cap today and cleaned up the connection on the coil. How would I adjust the timming?
gary

[mr jamez]

It is factory set and cannot be adjusted as such, you will need a timing light to check that it is correct, sorry I can't remember off heart what would cause it to be wrong (wait for kickstart to arrive )

Oh and if it is reving randomly perhaps check for an airleak, make sure the rubber intake manifold is not split, and spray WD40 around the base on the gasket to see if air is getting sucked in. You will need to remove the carb and the manifold to check the reed valves.

[alains]

i agree , any of these problems come from , sparkplug (try a BR9EIX from https://www.sparkplugs.co.uk ) , carbon or badly timed RCvalves , tired reed valves (try bue-oil carbon set) . you may check in this order , avoiding to lost money for nothing . by the way using an EIX sparkplug will save 1/2 to 3/4 L each time you fill up .
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the worst day fishing is better than the best day working

[nsr125.98]

I think that my dad checked the timing(used to be a mechanic) using a light thing and said it was alright.
And I thought Honda's were supposed to be reliable

[mr jamez]

No bike will go on forever and ever it won't take long to find the problem.

[nsr125.98]

It just seems that everything is going wrong at once, like my indicators not flashing, speedo drive breaking, exhaust falling apart, general electrics dodgy!

[mr jamez]

Get a new relay for the indicators, about £2. You can pic a speedo drive and exhaust up cheap on ebay, even buy a whole wiring loom cheap. NSR's are not hard to fix, there is hardly anything to them really

[alains]

i would like to tell to everyone of you that the NSR is a nice & reliable bike , but like the beautiful women it nees to be cocooned . do your maintenance as recommanded by honda , better your treat your nsr better it will respond to you i forgot prior of this post to recommand a good cleaning of tank & carb (due to water or mud)
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the worst day fishing is better than the best day working

[NSR125-Kid-UK]

[alains]

by low quality petrol , especially when you fill up with the bottom of the services tank or when the % of humidity in the petrol is high . what i will recommand is to clean carb and tank every year .
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the worst day fishing is better than the best day working

[washhandbasin]

whats the battery like the powervalves are worked by a servo the rev counter is electric to
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skinup!!!!!!!!

[alains]

you're wrong because the power tricity is provided by the alternator , but it could be possibly a faulty regulator . this is easy to verify , if you your engine start normally with the starter , your battery is fonctional . but if after several starts you have not any more power in the battery , the charge is not working , and as far as it does not charge your ignition will not work either
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the worst day fishing is better than the best day working

[nsr125.98]

Im not sure if the battery is ok, mite get it checked. Dont think i've got mud in my fuel tank though . Thanks for your helpful replies
gary

[alains]

take off the tap and you will be surprised by what you will find inside the filters
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the worst day fishing is better than the best day working