Scandal

Hi all Just un update i have now sold the Dt on ebay to a guy down the road from me he is well chuffed with it and think he wants it more for off road a shame really ?? its gone to a good home and have the pics . Decided to keep my honda as im gettin 100 mpg out of it . Thanks again for all your help dave

Hi all I have referb my carb and bike is running / ideling about 1500 -2000 rpm , circumstances have played a major factor so now im forced to sell both my dt175 and honda mtx 125 my house needs work done to it . Great sound it makes i got to take it round the block is real sweet now only taken me 170 hrs and 150 quid all worth it thanks for all your help . Dave

hi all i fixed the exhaust and put the bike back together it kicks over 2nd 3rd time goes on choke but as soon as i take choke off the bike wont idle , i didnt get the carb but foud the jet needle is 4j13 not 4j6 so have ordered a carb kit and will re do the lot sort the air screw and needle jet hopefully job done lol.

Hi all Just an update ihave fitted the spare barrel and head new piston, rings ,bearing ,fitted the spark plug and nothing at first ,we then looked at the carb again and noticed the jet needle had the faintest of bends in it lucky i had a spare , fitted it and hey presto it kicked over but it was screaming its nuts off and wouldnt idle got it to 3-5 k then no idle so decided to go for a new / old carb from ebay lol . The other problem is the exhaust i fitted gasket and went to tightern the bolts the origional barrel has larger holes ??? does any one know what size they are as my DT 175 is a G ( 1980) model. dave

hi cynic i have 2 now lol but was thinking of boreing out the old one to 2 mm then fit and sell bike and sell other barrel as i have now purchased an honda mxt 125 RHW 1990 model and am actually on the road with it !!! i would prefer the yamaha but dont have confidence in it any more ( more mentally ) i was thinking of purchaseing another dt 175 but a 2005 -2006 model import and have actually asked a dealer to source one . Would then get rid of both for it . As far as the old barrel goes i think its standard 66mm so should be ok , as far as barrels go wemco do brand new barrels on request for £112 i just want to get this bike ship shape and running to sell on ebay , keep the honda temp and get another yam 2 stroke 175 import or the DT200 not sure yet LONG LIVE YAMAHA

hi all today i have found the problem it is a scored piston big big big time will post a pic as i cant believe it and a new barrel or rebore to 2mm i have aspare barrel will find out if it has been bored out , so far its new piston rings barrel and bareings . thanks in advance

HI all Just an update i have bought new top end gasket set , costic soda the exhaust blown the carb out some shit come out the jet , replaced one bolt that is loose on barrel purchased the origional dt washers and hexagon nuts , good news is it looks like the oil fuel mixture is now mixing in cylinder as before it was just fuel , i have set the spark plug gap correctly with gauges as the gap was too big ? another possable cause . Will put the bike together and see if it fires up , if not next is the piston rings then a strip down full bifta lol. cheers scandal

cynic you are right i think its oil its so frustrating ive come along way already , i will look at your list of things and see if i can replace the lot another few weeks off the road wont hurt, i was thinking of getting a dealer to look at it . I will shop around for parts my bike funny enough i was told to stick to 45 - 50 mph sounds familia hey lol .Keep the good advice comeing mate . Thanks in advance

hi cynic i will try to get some pics tomorrow as bike at my nans house im at a total loss as it it torqued and together properly still nothing my dad says he up for stripping engine but i think i might ebay it not sure what to do yet as all i wanted was a cheap run around not to spend money on !!! not sure weather stripping engine will do any good if we strip it i would replace the reeds head bolts and oil seals , i have a heynes manual so we could do it , i begrudge sending it to a dealer for such basic technology and have my arm ripped off.Is it possable an oil line has air in it and or blocked ?

the oil that is comeing out is redish in colour and of a sweet smell its the same oil in my oil tank under the seat and its clean , it did look as though it had dropped a fraction level wise .??

hi cynic the bike was running fine before it died the oil is leaking from the outlest under the carb from the oil tank and the oil overflow that area this is only a new prob in the last 24 hrs just assumeing its oil seals as still no real compression / could do with a bit more as far as i know only piston and rings replaced . the head is torqued the gasgets replaced and exhaust done and polished carb sorted fuel in cylinder and spark plug replaced the oil suggests to me oil seals . Dont want to take the bike in to a dealer as i dont want to waste money , would like to get it sorted soon other wise it will end up on ebay as a non runner lol. Getting to my wits end

hi all got a new problem torqued the head and replaced the exhaust and bits , now the bloody thing has an engine oil leak could the oil seals have gone in the first place looseing compression and explain why it currently has not whats required compression wise , if so how big a job is it to replace the seals . Any help would be most grateful lol thanks in advance .

I forgot to ask is it possable to fit the later dt 175s 1998 onwards tank and seat to my 1980 model as the design did not change much? , cheers .

hi all took the head off and exhaust polished the head up and barrel piston and exhaust port , while takeing the head off 2 bolts were tight and 4 yes 4 !!!!! were loose above hand tight gasget is in mint condition have got a torque wrench so will tightern up the lot tomorrow will run like a dream i hope lol

hi the bike has had new parts all over have paperwork to prove it the carb was fine and timeing is electronic electrics all fine and there is fuel in the cylinder , the only thing left is the head were the oil is leaking from the gasget the 1mm overbore is not run in yet , and the bolts have been known to come loose as they may need re torqueing at a few hundread miles .

The bike has had new barrel and head the bolts have been replaced as i have a margarine tub full of bolts and cogs and carb replacment parts gasgets replacement barrel that was the original one .

Hi all the carb is clean and no longer overflowing bike still wont start, we think its the head gasget gone as it feels like compression is not what it should be , the head could well be warped , as there is oil leaking around the gasget not to the point of leaking on the floor , the bloke i bought the bike off tighterned up the nuts but said they need torqeing up , i get 13 miles down the road and the gradual power loss . Its the only thing that is left as all other problems have been eliminated.

We will cheack out the floats and needle we had them out today and never cheaked thinking it was a dirt problem .

Hi the fuel comes out when the fuel tap is put on and the bike being preped for starting e.g choke then procedes to carry on untill i switch the tap off , the engine has had an 1mm overbore and wasnt run in fully so was being easy with it the gearing on the front of the bike is 1 tooth less for more acceloration and less top end .

Hi thanks chaps we thought we might be on the right track with the floats tomorrow we are takeing the carb apart again see whats occuring. thanks again

Hi all i purchased a dt175 last saturday 3/4 of the way home it gradually died , i got it to my fathers house were we replaced the spark plug all fine with that , the next thing was the carb as the spark plug wasnt getting wet , so this weekend we stripped the carb which seemed clean we proceded to put back the carb and try starting as normal , at which point we noticed once the carb was full it was constantly overflowing ( had done this before) but writed it self . This time we noticed the spark plug was get fuel as it was wet a good sign, the problem is the fuel overflowing . I shall point out the electrics tyres and everything elese on the bike has been rebuilt the engine has a 1mm overbore and not fully run in yet. The floats were put in exactly how they were taken out just of note . We will take the carb off again and have another look not sure if we are on the right track , we tryed bumping the bike and also noticed it wants to go and there is a puff of blue smoke out the back ??? along with backfireing . any help would be helpful thanks in advance

hi im in sunny essex will only use the bike in good weather only wanted it for work and field but its in too good a condition to take green laneing , esp as fuel prices going up , will post pics when i get time pick it up at 9.30am tomorrow .

Hi all i have just purchased an DT175 1980 model UK import the bike is in almost show room condition , hope to be a fair weather rider and go to a few meets .