• Bike Has Been DYNO'd on RES (reserve)

Posted: **Wed Jan 26, 2011 10:13 pm**

Heyup PornDogUk.

well when i questioned him on the price, and how much it was going to cost me, (when it was the RS125) he gave me a rough price and it was like £80 or something which wasnt to bad suppose,

he told me he charges £25/hour, my girlfriend was in shock lol, but i said thats not too bad, i understand the equipment he has is expensive and you have to be trained etc. but it kinda got out of hand, as he didnt get in touch, and my gf was worried when it got to 5 ocklock and technically my bike had been with him for a good 7 hours, so thast already £175 in hours work, altho when i rang him he said dont worry im not going to charge you all day ive been on it soneso and sonese in the after noon,

anyway when i asked him the next day price, he also has fitted me 4 new Spark plugs, at about £40-£50 which i know they cost that, he said they are Iridium, hope they bloody are, the ones that came out were E9ERH or something, dont think they were irdidium.
i got charged £150 inc the spark plugs, so it wasnt too bad suppose, i only work in a bar/restaurant (21) so thats a good weeks wages for me, which is Sick lol, but i think the fact i feel my bike isnt more powerful and the fact it could oil up the plugs soon and start back firing kinda makes me a lil upset,
for £125 i wanted my bike Accelerating liek Dani Pedrosas

anyway £150 i got 4 new Spark plugs in, and lots of hours of work on it, a few DYNO runs too, he showed me on the screen, i even stood through one run when i saw him today, which was fun

i know it does take time to work on the VFR400 and it was like the bike was in hospital when it was rigged up with stuff stuck in exhaust and fans and belts around it etc haha, but he had it a good nearly ( 10-5.30 and 9.30 - 2.30) ish so im lucky he hasnt charged me for 13+ hours lol :S @ £325 +£40 sparks = £360, i think my Uncle and Dad etc might of had to go down to have a few words :)
thanks for your response :)

Posted: **Wed Jan 26, 2011 10:37 pm**

Hi Butler, As CMSMJ1 has said,
You need to let us know what size jets you have in?
Did the guy replace the missing exhaust gasket?
and get the dyno read outs.
I might be wrong, but i don't think you can get iridium plugs for these? I am sure someone will be along in a sec and confirm one way or the other.
And for £150 i would want the exhaust gasket sorted, as that is pretty important to the running of the bike.
As has been said before, get a haynes manual and get the spanners out. You will enjoy learning teh bike and there is motre info and advice on here than you can shake a stick at

Also what size sprockets do you have on? it sounds like you are running a bigger rear or smaller front if you are getting 70 on teh dyno and the clocks are reading 100

porndoguk wrote:
CMSMJ1 wrote: youon the bike - drop me a note - I work in Wakey and will be dropping down to another forum members gaff in ne will see that we don't fuck about...the bikes are awesome pieces of kit, the like of we'll never see built again.
that bought a tear to my eye

If you get time read some posts on here about carb set up, you will soon pick it up
Welcom to the joys of teh V4

Posted: **Wed Jan 26, 2011 10:54 pm**

Yea u can buy iridium plugs for the nc30/35 but they are not cheap
Would cost about £80-90 for a set of 4

Posted: **Wed Jan 26, 2011 10:58 pm**

butler46 wrote:anyway when i asked him the next day price, he also has fitted me 4 new Spark plugs, at about £40-£50 which i know they cost that, he said they are Iridium, hope they bloody are, the ones that came out were E9ERH or something, dont think they were irdidium.

NGK DONT make Iridiums for the NC30, so it will be denso plugs which im not a fan of,

but i would deffinatly check if you got iridiums or even new plugs? pop the rear seat off and check the rear 2 easier to get to, but having said that the fronts are tricky so has he changed them at all?

£300+ sounds as if youve been raped in all fairness.
im planning on getting my nc dynoed in the end of feb/mar but im going to do my research before i go i dont want a crap guy working on it as i know how specific these bikes are,

i beleive im lucky that there might be a guy in bilston that has been recomended on here a few times but as i say im going to research closer to when im ready for it to be done, my bike has been runnin rich for quite some time, and i think i may have cracked it with a K&N panel filter but will only find out next couple of days when i get to fire her up at last.

as for the air flow, there is a very small opening under the frame and above the engine just bellow the headstock for the airflow, 2 x 10x30mm inlets veyr small i know, then above that theres another plastic tray which mounts over the carb tray which ive cut out for the air to get through more freely, i still have standard air box, snorkel rubber flaps/tray only mods are the K&N and the 25x70 oval ive cut in the base plate for better fresh airflow. it doesnt show any difference but its not harmed it. dont remove the filter on the road, only for track your less likely to be picking up crap on a track.

id be keen to know what jets your runnin, and as for the back firing its just because your not having enough air into the mixture and when its passing out the exhaust it was re igniting with fresh air. simple science of the fire triangle heat, oxygen, fuel

Posted: **Wed Jan 26, 2011 10:59 pm**

code2006 wrote:Yea u can buy iridium plugs for the nc30/35 but they are not cheap
Would cost about £80-90 for a set of 4

and there horrid DENSOs

Posted: **Wed Jan 26, 2011 11:00 pm**

hi, im sorry, i love riding the bike, but im honest to say i dont know too much about Mechanics, although im learning. i will try and find out the jet sizes, if i find these out, will you be able to recommend the right sizes etc ?

is it something i said earlier for you to say "Did the guy replace the missing exhaust gasket?" im not sure thats all, is that why im getting Oil/i mean fuel ? in my carbs ?

where is the Exhaust gasket on the VFR400 (i sound so thick) sorry

are they the 4 entrances to the Engine from the exhaust pipes 2 at front and 2 at rear ? might one of these need tightening ? or does the gasket need a new o ring etc and sealing ? could this be why im losing power ? or fuel is getting to my carbs ?

i have a haynes manual and a handy father when hes not working, so i might be able to sort out these problems, this is the only time id give my bike to Someone else, my dad and Grandad once fitted me a new Aprilia Rs125 Engine in a night for me, there all pretty handy lol,
but obv you need a dyno for a bike to be set up (proparly)

im not sure about Sprocket sizes, although i do feel i have the same sizes as the JAPAN standard ones ??

btw it has like a KMH-MPH converter between the speedo cable and clocks to change the reading of the KMH into mph etc. could this be why ???
many thanks :) adam

Posted: **Wed Jan 26, 2011 11:06 pm**

butler46 wrote:hi, im sorry, i love riding the bike, but im honest to say i dont know too much about Mechanics, although im learning. i will try and find out the jet sizes, if i find these out, will you be able to recommend the right sizes etc ?

is it something i said earlier for you to say "Did the guy replace the missing exhaust gasket?" im not sure thats all, is that why im getting Oil/i mean fuel ? in my carbs ?

missing gaskets can cause back firing by drawing air into a hot exhaust

where is the Exhaust gasket on the VFR400 (i sound so thick) sorry are they the 4 entrances to the Engine from the exhaust pipes 2 at front and 2 at rear ? might one of these need tightening ? or does the gasket need a new o ring etc and sealing ? could this be why im losing power ? or fuel is getting to my carbs ?

the gaskets go between the exhuaust and the cylinder/exhaust port outlet

i have a haynes manual and a handy father when hes not working, so i might be able to sort out these problems, this is the only time id give my bike to Someone else, my dad and Grandad once fitted me a new Aprilia Rs125 Engine in a night for me, there all pretty handy lol,
but obv you need a dyno for a bike to be set up (proparly)

im not sure about Sprocket sizes, although i do feel i have the same sizes as the JAPAN standard ones ??

youll probally have 15T x 40T i have this set up and its fine but i plan on dropping a tooth on the front but will use more fuel lose about 15mph of top end and inacuracys in the speedo reading

btw it has like a KMH-MPH converter between the speedo cable and clocks to change the reading of the KMH into mph etc. could this be why ??? Why what?
many thanks :) adam

youll fit in here ok we all like to help each other out youll be a buddy bike mechanic in no time

Posted: **Wed Jan 26, 2011 11:12 pm**

btw i didnt get charged £300+ in the end, thats how it would of cost with how long he held onto my bike for

lol, he charged me £150 in the end, inc the 4 S-plugs, i dont think he rated NGK anyway, the mans a really nice guy and altho hes talking to a lad who knows little,, he seems as he knows what hes talking about lol, altho any1 can B-Sh1t for extra money, Ill check the spark plugs,

he recommended i get a K&N filter for it, but also said to take off the other filter, but liek you said being a road bike i wont do that now :S

you know when you said "the back firing its just because your not having enough air into the mixture" is that because my carbs were set running to Rich ? how come i wasnt getting enough air ? i thought the back firing was because my Plug was breaking down ??? because it was covered in fuel ???

anyway if thats so then okay :D im learning alot tonight, and appreciate it all, how many people can help me out, i love my VFr400 :D but would love for her to be running sweet :)
thanks again bikers

Posted: **Wed Jan 26, 2011 11:14 pm**

butler46 wrote:hi, im sorry, i love riding the bike, but im honest to say i dont know too much about Mechanics, although im learning. i will try and find out the jet sizes, if i find these out, will you be able to recommend the right sizes etc ? Yes find out jet sizes and float hights, and get some pics if you can?

is it something i said earlier for you to say "Did the guy replace the missing exhaust gasket?" im not sure thats all, is that why im getting Oil/i mean fuel ? in my carbs ? I doubt very much that a missing gasket would oil up the plugs, but it would affect the crispness of the bike.

where is the Exhaust gasket on the VFR400 (i sound so thick) sorry are they the 4 entrances to the Engine from the exhaust pipes 2 at front and 2 at rear ? might one of these need tightening ? or does the gasket need a new o ring etc and sealing ? could this be why im losing power ? or fuel is getting to my carbs ? Yes there are 6 gaskets in total have a look in your haynes manual at the exhaust and you will see what they look like and where they are, also bookmark this site it's got some good info

http://www.akhara.com/

i have a haynes manual and a handy father when hes not working, so i might be able to sort out these problems, this is the only time id give my bike to Someone else, my dad and Grandad once fitted me a new Aprilia Rs125 Engine in a night for me, there all pretty handy lol,
but obv you need a dyno for a bike to be set up (proparly)

im not sure about Sprocket sizes, although i do feel i have the same sizes as the JAPAN standard ones ??

btw it has like a KMH-MPH converter between the speedo cable and clocks to change the reading of the KMH into mph etc. could this be why ??? I would think tha tthe dyno should be spot on speed wise, so you may have a dodgy converter?
many thanks :) adam

Posted: **Wed Jan 26, 2011 11:19 pm**

Ive only just skimmed through this thread but your bike is never going to be right if you keep taking it back to that place, no disrespect to him but NC's like to be setup right which is dead easy when you know how but most likely mind bogling if you dont. If you insist on taking it back there print him out a copy of cammo's carb setup guide and give that to him, i never known a NC not to run right after setting the bike up as per this guide.

The idea of taking the filter out on a pretty much bog standard NC makes me cringe

Or get yourself a haynes manual and do it yourself

Bike Has Been DYNO'd on RES (reserve)

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Bike Has Been DYNO'd on RES (reserve)

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