DT125R ARCHIVE

mr karnage · Guru

weird problem after rebuild

mr karnage · Guru

just put the bike in first and pulled the clutch in and it wont roll then put in it nuetral and i can kick it without the use of the clutch

sticky clutch or drag?

NORFE · DTR Trusted Engine Builder

have you had the dottom end to bits completely?

sounds like somets a mis some where with shim/spacers not letting the clutch dissengage proply as it should

have you got all the gears selecting as they should ?

id whip the clutch off and check every things in right place and set correctly to start with smile

mr karnage · Guru

yh i did have a look but didnt take the clutch off and just shifted through the gears and it was fine

i think i might have been a shim in the wrong place because the kickstart sometimes plays up like the gears not in line with the basket

i can shift through the gears fine

the clutch problems pretty much gone now, i had it running for a while when i was setting the carb up

ill take the clutch off and refit it, see if its anythings out of place

mr karnage · Guru

you aint having my address

-- Edited by mr karnage on Saturday 23rd of June 2012 09:15:12 PM

-- Edited by mr karnage on Tuesday 26th of June 2012 05:50:20 PM

mr karnage · Guru

another thing is the carbs always pissing out fuel

ive reset the float to maximum spec about 3 times and it starts playing up while im trying to start it

and it idles fine when its started after about 20 kicks, then it starts revving itself after a while and it will then piss out fuel

no air leaks and its got new crank seals, think the carbs on its way out tbh

might have that 34mm off you norfe

GADGET · Guru

Try tappin the carb with a screwdriver as its fillin up espesialy if you've drained it recently ,the float valves get stuck coz their dry ,once it's movin again should be ok coz it will have fuel round it ,make sure you do it with the bike upright,if you do this a few times it will loosen up and just start working,hope it works for you as it did for me

mr karnage · Guru

took the carb off at mo and rebuilding it with new o rings and givign it a proper clean

the choke levers a bit suspect, its weeping fuel slightly

mr karnage · Guru

took the casiung off and sorted the kickstart issue

took the clutch basket and plates off, selected a few gears up and down. everythings ok

then put it back in nuetral and tried turning the basket and its almost like its in first but the nuetral lights on

so im messing around with it and it clicks suddenly its and its free

dropped it in first and back up to nuetral and its fine

NORFE · DTR Trusted Engine Builder

check the needle valve to see if the rubber tip is fully intact and not got a groove worn in it as some do over time

i think bradders wants it mate tbh gonna get holda im tomos and find out

its normally sumets daft with carbs, just set it all to manual spec to out rule the carb then move from there

where did u get the right crank seal from as no where iv bought them from are supplying the correct 1

even yam bits

!!!

its a double sprung lip not just a double lip, it was this what was screwing up my running leaking crank case pressure and letting tranny oil in....

ask coastie hil tell u the difference in the seals from genuine to the one he got

if u want a link to it let me no as yammy 1 is £20

and the one i got from a company online was £8

biggrin

mr karnage · Guru

yhyh checked that other day

i put the fuel pipe on and left the bowl off, put the tap on then lifted the float and it was fine

i bought all geniune washers and seals

norfe matey, you havent got a clutch inner spare?

ive just managed to snap a clutch spring bolt

NORFE · DTR Trusted Engine Builder

ha ha yes mate i have £5 posted do u?

i dont no how ur all managing to do this your the 2-3rd in a month or 2 lol

what u using to tighten em up a meter long scaff bar ha ha confuse

mr karnage · Guru

yhyh whats you paypal?

haha i was doing them up with a torque wrench and one of them just popped off

NORFE · DTR Trusted Engine Builder

dannicook@fsmail.net

reply with full name and addy will post monday geeza

ha

NORFE · DTR Trusted Engine Builder

no probs mate will get it in post mondy biggrin

mr karnage · Guru

manage to post it?

NORFE · DTR Trusted Engine Builder

aup pal, yeah it on its way biggrin

mr karnage · Guru

when should i expect it?

NORFE · DTR Trusted Engine Builder

posted it yesterday morning so should be with u 2mnoz or thur pal

mr karnage · Guru

got it

cheers mate

GADGET · Guru

Hi mate ,did the tapping the carb thing work or did you have to splash out on a new valve? Also the way you've explained the prob with the boggin out sounds like the pilot jet is blocked. Check the air screw is correct ,ain't your bike a 1990 ??? Coz the carbs are different on the earlier ones and the Haynes for a newer yeah will be giving you the wrong specs,let me know ,mines a 1990 so I could get the specs for it for you

-- Edited by GADGET on Friday 29th of June 2012 05:02:14 PM

mr karnage · Guru

so its starts fine now on choke but it revs up to 4k on choke, take it off choke and it dies

the throttle does nothing at all except kill it off, even took the filter out and it made it worse. it sounds like theres not enough fuel

the carbs not pissing out fuel now and the floats set to spec.

mr karnage · Guru

took it out again and think ive got an air leak

on half choke it starts and revs to 4k, turn the choke down the slightest bit and it sits at 2k, turn it off and it dies

it only revs on half choke but the response if fine

mr karnage · Guru

GADGET wrote:
Hi mate ,did the tapping the carb thing work or did you have to splas out on a new valve? Also the way you've explained the prob with the boggin out sounds like the pilot jet is blocked. Check the air screw is correct ,ain't your bike a 1990 ??? Coz the carbs are different on the earlier ones and the Haynes for a newer yeah will be giving you the wrong specs,let me know ,mines a 1990 so I could get the specs for it for you

after i rebuilt it, its been fine but i did give a tap a few times.

i did clean it out proper, had the jets sitting in carb cleaner whilst i was messing with the carb. cleaned the jets out with a bristle off a brush and blew it through.

still on same carb, yhyh its a 1990, flat slide carb

what are the specs on the float, i could make it higher to give it a more richer mixture and see how that works.

GADGET · Guru

Hey there mr k :), Get some wd40 ,get the bike going turn the tick over right down,if you haven't already

spray slowly around the intake boots and Carb etc,if the bike starts to peak then you have a leak right there

if it settles then dies out slowly then turn the tick over back up till it will give you the lowest tick over possible and starts nice ,your now on the start of the next jet and you have found the area of the rev range that is lacking,but will have gained a starting point,someone might have cleaned it out in the past and ruined it

I had to make one good carb outta two old as fooook carbs but the only thing that really gave me sheeet was the pilot circuit ,it's very sensitive and on a bike of this age the only option was to replace the jet with a brand new one ,the pilot jet is in use all the time throughout the rev range and can kill an engine in not a lot of time,also check your crank seals,is the plug oily ???

etc etc ......sorry this is so long

-- Edited by GADGET on Saturday 30th of June 2012 12:32:33 AM

GADGET · Guru

If the choke was givin u probs it might not be sealing properly ,this could explain the high revs as it would now be sucking in air,the choke is easy to refresh with a couple new orings etc,I will get the full carb specs to ya fella,..oh and the carb should have a mixture screw just to the right of the tick over screw ( down a little tube part ,it might be rounded off tho as they get abused by numptys) then we have to undo their shoddy work lol,I got an ultrasonic cleaner from maplins £20 odd ,I done loads of carbs in it now,if the bike had fuel left in it it could have started eating into the carb as varnish

1 sec I'll get a diagram of nevs just to make sure it's the proper carb

-- Edited by GADGET on Saturday 30th of June 2012 11:20:37 AM

NEV · Guru

Aye tis a weird one that Karny, this is how they usually are.

Also the standard pan head screws, on the front panel, have deffo been changed for allen screws.

Just noticed too, it's missing the overflow spigot just underneath the throttle screw, what model does it say on the carb exactly? real strange that one.

-- Edited by NEV on Saturday 30th of June 2012 01:13:07 PM

mr karnage · Guru

lol yh i know mate

when i checked the float when i first bought it, it was way out according to the manual.

ill just have to mess around with it

-- Edited by mr karnage on Saturday 30th of June 2012 02:50:22 PM

mr karnage · Guru

ive been putting it off because the revs were all over gaff, ill give it a go after my brekky.

i know what you mean, its a shame they didnt put a mixture screw on the carb. it would have been easy trying to work out if its an air leak or not

all seals are new genuine parts and the plug its the tiniest bit oily

mr karnage · Guru

done it, before i could see fuel seeping through when lifting the choke. now its dry as a bone. the revs where all over the place before now it does exactly the same thing on choke and off. thats why i suspected the float settings. i remember when i got the bike the float was set quite low and ran nicely, then i raised it to the round slide settings which was alot higher.

the carbs got brand new o rings and everythings clean