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XR650-R

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Posts posted by XR650-R

    bubble in fuel line

    in Yamaha Workshop

    Posted

    Turn your bike upside down for 30 minutes air bubbles will rise to the carb and get burnt off with the petrol....if you look closely at the exhaust you might just see black bubbles coming out ?....just don't pop 1 as they will stink.

    • Like 3

    DT175MX Still Running Poor After MOT & Ride About

    in Yamaha Workshop

    Posted

    Shame I used to have a tester which could do 250v,500v & 1000v :)....I will unwrap the coil tomorrow and have a look inside got nothing to lose and might even try a rewind. Thanks for all the advice guys as mentioned really want to get the bike sorted as a dead bike is no good to anyone...does my head in having a bike it bits...not short of something to ride mind you...

    DT175MX Still Running Poor After MOT & Ride About

    in Yamaha Workshop

    Posted

    I have already asked about the resistance values and will let you know their reply....going back to my bike and it's current 206ohms would you suggest all my problems are related to the poor values ?, even when the bike ran it was running poorly like something was breaking down electrically ?...source coil in particular as everything else checks out OK not done anything with the CDI unit.

    DT175MX Still Running Poor After MOT & Ride About

    in Yamaha Workshop

    Posted

    OK what would the effect of a low resistance coil be ?, bad/no spark as that's my symptoms really hoping to nail this problem once and for all, Yamaha should reply tomorrow if their prices are not to sky high I will get a new 1 from there. I read your post on the electrex coli's and having to modify the slot so they fit ?....I don't mind going down that route if I have to there are some cheap coils on ebay which say they fit the DT's...

    http://www.ebay.co.uk/itm/321674846549?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

    Anyone tried 1 of these ?

    DT175MX Still Running Poor After MOT & Ride About

    in Yamaha Workshop

    Posted

    Small update spent a couple of hours this morning testing wires etc, nothing broken on the actual wiring but the source charge coil is only showing 201ohms rather than book 300ohms ?....the pulse pickup coil is OK at 9.8ohms book is 10.0ohms +/1 10%

    I have tested the ignition coil with a power supply and I get a nice spark when dropping 7 volts on to the coil...so that seems fine along with the plug....

    So it's either the low source charge coil or the CDI is borked ?.....any thought anyone ?

    Hmm my log book says its a 2K4 frame and according to the manual it should have a Source high speed value of 13.6ohms across the red & black wires....my bike doesn't have a red wire from the generator ?.....which would match up with the "All other models" part of the manual ?....which state Not Applicable ?

    My generator has the following wires which all match up to my loom and plugs etc...

    Green/White

    Yellow

    Brown

    White/Red

    Black

    Confused now

    DT175MX Still Running Poor After MOT & Ride About

    in Yamaha Workshop

    Posted

    Bike passed her MOT today and she is all set ready to go but now she won't start from the kick starter and is reluctant to bump start, when she does run she is poorly at mid range but ticks over fine....?.

    Removed the coil tonight and primary is spot on 1.0 ohm but secondary is 12k ohm rather than 5.9k ohms as per book ? I did have the plug cap in place whilst testing....is that wrong...

    Anyway messing tonight I do seem to lose the spark from time to time which might explain the poor running and the more lately non starting problems, I have un-tapped the wires below the coil as when I was trying to bump her she did fire slightly when messing about in this area; however I have found no external wires damaged within the loom. Are the coils know to fail ?, might be the original item which is 35 years old:)

    Bit of a bummer as she is tax'd, MOT'd and insured now just won't run :(

    175MX 1980 Bash Plate Rubbers & Tapped Hole Help

    in Yamaha Workshop

    Posted

    So to remove the seat you have to take the side panels off then un-do the seat strap bolts then the seat bolts :).....sounds like work lol....

    Any thoughts on my other issue the bash plate rubbers ?.....anyone got any info on them....I could do with new rubbers and new top hat spacers but again not any info out there showing the little buggers lol.

    175MX 1980 Bash Plate Rubbers & Tapped Hole Help

    in Yamaha Workshop

    Posted

    I had 1979 DT125MX that had the box section swinging arm and that only had a single mounting bolt for the muffler and my mate had a 1980 DT175MX with box section swinging arm and that had two mounting bolts on the muffler.

    Ref the tapped hole I seem to remember you could fit a seat strap across the seat and the strap mounted on the frame under the seat. Is there another mounting on the other side that would roughly be inline with the middle of the seat.

    Tony

    Good call on the seat strap.....will have a look over weekend and report back....just find it strange that no matter how hard I look online at drawings and parts lists I cannot find any 2 hole mufflers or bash plate with rubber gromments :).....I am normally good at tracking part numbers down etc....get worried when google shows up nothing lol

    175MX 1980 Bash Plate Rubbers & Tapped Hole Help

    in Yamaha Workshop

    Posted

    Hi guys, sorry to keep asking questions but here goes...

    Removed my bashplate this morning and she is attached with top hat spacers and these go through rubber bushes....however I cannot seem to find any parts drawings with these bushes shown ?...I have gone through all years of the 175's and they all show just bolts going through with washers...no top hats and no rubbers :(.....any idea's of numbers or links to diagrams ?

    Second question what does this tapped hole do ? it's the 1 on the left looks like m8 it don't seem to go anywhere lol ?

    whilst your thinking, my exhaust tail section has 2 mounting bolts and cannot seem to find a drawing which shows this either :)....and non seem to show square section swinging arm ?

    Dsc06366.jpg

    Unable to increase tickover

    in Yamaha Workshop

    Posted

    Check the throttle valve where it engages with the adjuster screw . If it is pitted or worn it will be difficult to fine tune the tickover and should be replaced . Always lift the valve (via the twistgrip ) before adjusting the idle adjuster screw in order to prevent this type of damage occuring .

    Makes sense, in the past I have always just adjusted the screw inwards/outwards without doing the throttle lift bit. Don't remember seeing any damage to the vlave when the carb was in pieces but will check....:)

    Unable to increase tickover

    in Yamaha Workshop

    Posted

    Hi guys,

    As posted before bike starts and ticks over pretty good now, but noticed the tickover screw even when fully in won't increase RPM....if I back it out it will decrease ?.....not a big problem but would have thought it would increase and decrease either side of typical tickover as required ?....

    Anyone have any thoughts on why it should be like this ? From what I can remember the carb slide did lift when winding in the screw when it was on the bench. Maybe it still down to the bike needing a good run and clear out ?....sadly with all the white stuff and cold weather that won't happen till Spring lol....

    Happy New Year

    Bogging Down DT175MX

    in Yamaha Workshop

    Posted

    Think I need a long private road....lol....wasn't planning on using the bike till the sun shines....March onwards as such she don't have any MOT, TAX or Insurance....might get the bike rack out and take her somewhere private for a blast :)...

    Bogging Down DT175MX

    in Yamaha Workshop

    Posted

    Aye XR" an engine will rev freely in neutral, as it needs only a whiff of fuel. sounds like your float levels low, it wont be the main jet, as you need to be wide open to bring that into play,,,needle jet or lift needle two notches,,,

    Take off fuel pipe from tank, open cock, and see the flow,,also :yeah:

    Hi Blackhat, thanks for info, float height is spot on and fuel runs freely from tap, I have an inline filter fitted and there is plenty of fuel in there....I have removed pipe from carb and opened tap to confirm it's running well. The bike hasn't been ridden for 21 years of course she has fresh petrol and a carb rebuild etc but would being standing for long period cause the bogging down ? the book says 3rd notch for the clip position would it be worth trying another groove ?

    Bogging Down DT175MX

    in Yamaha Workshop

    Posted

    Ok bike starts lovely now first or second kick and ticks over great...she will appear to rev OK stationary but when you ride her she sounds and feels like she has run out of fuel and just about to burst into life but doesn't do so....so you get this hesitation/bogging at 1/2 throttle and above. Cannot say I have ridden her far as she has no insurance,tax or MOT just up our road a couple of times but she seems poorly :(.....carb is spotless and I'm out of idea's as what else to try....main jet wrong ?...didn't see any numbers on it when it was last out...well non were obvious :)...

    DT175MX 1980 Not Showing On Insurance Quote Sites

    in Classics

    Posted

    Trying to get insurance for the above, but most companies don't either A. Go back to 1980 or B. list the MX version....lol....been quoted £155 for a classic policy which is taking the pi$$ Swintons were quoting £63 fully comp etc for the DT175 but when I rang them about the MX bit they went all shy and said they could not quote as it wasn't listed ?.....

    Do I just say it's a DT175 which they say goes from 1978-1985 which covers my bike anyway ?...

    Which Paint DT175MX ?

    in Yamaha Workshop

    Posted

    Thanks for the update, funny enough my wife.....god bless her as she does all the painting in the house said the Diamond White was to creamy now says the Froxen White is too white and the Diamond looks better lol....I think I will just stick with the Diamond and if it don't look right then thats tough luck for me, I appreciate its difficult to match up with 34 years old paint which has faded etc will post a picture when she is done and see what you guys think.....

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