dt50 no get up and go

imust bemad · L Plate Warrior Joined: 08 Apr 2006 Karma :

hi all

This is my first time on here and you must forgive me if i have gone to the wrong place..

Anyhow i have a dt50 that i am doing up for my son and i have cleaned the carb flushed out the reeds flushed out the tank and put in new petrol replaced the gasket on the head and checked the piston rings........

the problem i have i when i kick it going i cant get more than 3 miles and hour out of it with full throttle

i checked the floats and the needle in the carb i am at a loss could it be in the magneto( incorrect gap)???
any help would be gratefully received

John
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phantomtek · Lil Joe Tek Joined: 20 May 2005 Karma :

Have you checked the air filter? Is the fuel / air mixture set up properly?

imust bemad · L Plate Warrior Joined: 08 Apr 2006 Karma :

the air filter is fine and the air screw is 1 and 3/4 turns out from tight

Do you think its sucking in to much air?
____________________
ive been to hell and back.....................................and i like it!!!!!

numark1 · Scared of girls Joined: 09 May 2004 Karma :

What about choke or if it is manual make sure the clutch is releasing properly. My yz had that problem, was going no where and i thought the chain was slipping but the clutch wasn't disengaging properly

Skunkcap Freddie · Brolly Dolly Joined: 20 Oct 2005 Karma :

how many miles are on it , last time it had a new piston and rings

cagiva gezzer · World Chat Champion Joined: 17 Mar 2003 Karma :

3 or 30mph?

30 is about right for a old DT. 3 mph and there's something very wrong.....
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willi · Spanner Monkey Joined: 11 Feb 2006 Karma :

if the bike is a two stroke check the exhaust and silencer they may be blocked with carbon. two strokes have a tendency of doing this.
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imust bemad · L Plate Warrior Joined: 08 Apr 2006 Karma :

Thanks for all the replies

1 i dont know how many miles its has on it and i checked the piston and rings and they seem to be fine

2 its a manual choke and that working ok

3 the exhaust was clean allready but i cleaned it out just in case

It was a bugger to get started in the first place and it turned out to be the cdi unit was faulty i wonder if the problem is with the magneto?
____________________
ive been to hell and back.....................................and i like it!!!!!

imust bemad · L Plate Warrior Joined: 08 Apr 2006 Karma :

Just had another play with it got it up to 10mph(wow!!!)

adjusted the air screw nearly all the way out Laughing

any ideas???
____________________
ive been to hell and back.....................................and i like it!!!!!

stooster · Scooby Slapper Joined: 13 Mar 2006 Karma :

if the bike aint stalling then it is doing a fair few revs so the engine is doing its job. if you accellerate and the revs build up then its gotta do with the drive from the crank to the wheels.

sounds like a clutch issue to me if youve got revs but no drive.

failing that maybe an issue with the drive shaft and sprocket.

bigdave666 · Renault 5 Driver Joined: 16 Nov 2005 Karma :

i had dt 50

mine used to do summin similar all i did was change the plug and set the gap to what it says in the haynes manual.
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imust bemad · L Plate Warrior Joined: 08 Apr 2006 Karma :

i think i have sourced another engine

will a dt 100 engine fit in a dt50 frame?

Thanks Confused

____________________
ive been to hell and back.....................................and i like it!!!!!

phantomtek · Lil Joe Tek Joined: 20 May 2005 Karma :

numark1 · Scared of girls Joined: 09 May 2004 Karma :

The frame will be fine. If the engine design is the same size it wiil be ok otherwise you might have to make a few brackets up. Thumbs Up

Rookie · World Chat Champion Joined: 09 Feb 2005 Karma :

Remember we recently had someone killed, which may have been because he shove a powerful lump into a 50 frame. I doubt this would produce the same effects, as it's not a massive power difference, but it's something to keep in mind anyway.

Doesn't sounds like a new engine will fix your problem anyway; I hope that's not what you're trying to solve.

imust bemad · L Plate Warrior Joined: 08 Apr 2006 Karma :

thanks for all the replies

no i am not getting a new engine to fix my problem i just thought that it wouls be nice to have some more power?

I would have thought that the frame would to the stress of a bigger lump.Its only a small step up.
____________________
ive been to hell and back.....................................and i like it!!!!!

Rookie · World Chat Champion Joined: 09 Feb 2005 Karma :

phantomtek · Lil Joe Tek Joined: 20 May 2005 Karma :

meooo · Nova Slayer Joined: 23 Dec 2005 Karma :

if youve richened the mixture right up then youve probably got an air leak......it wont run without the air filter on (just in case) or a pancake type filter without up-jetting the carb...too much air in both cases.
You could have an air leak at the reed valve/crankcase joint. Usually apply grease to the gasket there because it breaks when you remove the valve set.....was there any sign of damage to the reeds?
Is there a vac pipe off...usually one to the tank outlet to pump fuel through.
have you had the carb apart? If so have you re-fitted the needle correctly so its lifting?

tony532 · World Chat Champion Joined: 29 May 2004 Karma :

are the revs going up and the bikes speed not matching them?.

have you tried adjusting the clutch?.

is the clutch slipping?.