48,000 miles. Valve clearances? - Page 2



+ Reply to Thread
Page 2 of 2 FirstFirst 1 2
Results 11 to 17 of 17

Thread: 48,000 miles. Valve clearances?

  1. #11
    JamieB76's Avatar
    JamieB76 is offline Senior Member
    Join Date
    Jan 2015
    Location
    Sidcup Kent
    Posts
    289
    Thanks
    22
    Thanked 24 Times in 19 Posts

    Re: 48,000 miles. Valve clearances?

    Fitz,

    I didn't realise the ULEZ was possibly going to be bought forward. Thanks for letting me know. Be an interesting car park where I currently park. Guy who normally parks next to me has three bikes, two will fall victim to the charge.

    As Tim said the valve covers can be tight. Don't do what I did on my spare engine and hit the side with a screw driver and hammer to try and move as the aluminum will break. Been there done that one. As long as you have a socket the correct size, preferably a good one you should be fine.

    When the other half has gone out later I will pop in the garage and let you know the size you need. When I checked the valve clearances they were fine, will check again in August as part of the refurb project.
    Honda NX650 1996 - Daily commuter

  2. The Following User Says Thank You to JamieB76 For This Useful Post:

    Fitz (29-04-17)

  3. Remove Advertisements
    XRV.org.uk
    Advertisements
     

  4. #12
    apox is offline Member
    Join Date
    Sep 2015
    Location
    Denmark
    Posts
    34
    Thanks
    8
    Thanked 2 Times in 2 Posts
    Have no problem removing the valve caps, but will give them a nice round of molypaste or copper paste before complete reassembly. The rocker arm bolts are very stuck though! Any tips/tricks? I've tried the impact driver. Maybe need compressed air. Also what do you use on bolts to keep from seizing? Copper paste? Moly paste? Anything need loctite? (Bolts on crankshaft drive?)

  5. #13
    Fitz is offline Senior Member
    Join Date
    Mar 2013
    Location
    London, UK
    Posts
    217
    Thanks
    79
    Thanked 8 Times in 8 Posts

    Re: 48,000 miles. Valve clearances?

    Tempted to have a go at the valve clearance job this weekend. Does anyone know the clearance spec for a '99 RD08? Also, daft question: when taking the cover off to find the TDC mark, will oil spill out everywhere? Told you it was daft, but only daft if you know the answer, and I don't!


    Sent from my iPhone using Tapatalk
    2000 W-Reg RD08 Dommie - my commuter bike!
    2014 Honda VFR800 F-E - Sunday best

  6. Remove Advertisements
    XRV.org.uk
    Advertisements
     

  7. #14
    JamieB76's Avatar
    JamieB76 is offline Senior Member
    Join Date
    Jan 2015
    Location
    Sidcup Kent
    Posts
    289
    Thanks
    22
    Thanked 24 Times in 19 Posts

    Re: 48,000 miles. Valve clearances?

    Oil wont come out. I will let someone else with the knowledge answer the valve clearance question.

    I think this is what I used but please wait until one of the more experienced people on here respond. Good luck.

    Intake, 0.10 mm (0.004 inch). Exhaust, 0.12 mm (0.005 inch)

    Honda NX650 1996 - Daily commuter

  8. The Following User Says Thank You to JamieB76 For This Useful Post:

    Fitz (21-05-17)

  9. #15
    650 Fred's Avatar
    650 Fred is offline Senior Member
    Join Date
    Oct 2007
    Location
    South wales
    Posts
    1,756
    Thanks
    53
    Thanked 195 Times in 168 Posts

    Re: 48,000 miles. Valve clearances?

    Thats correct Jamie but i do the exhaust a tight 0.15mm as i don't have a .12mm feeler gauge
    Current toys
    1993 CB1000 (Big one)
    1994 RD07
    1996 Modified NX650
    2001 XR400
    2016 CRF 1000L

  10. #16
    thetimkirby is offline Senior Member
    Join Date
    Dec 2008
    Location
    Anglesey and NZ
    Posts
    919
    Thanks
    15
    Thanked 95 Times in 73 Posts

    Re: 48,000 miles. Valve clearances?

    Quote Originally Posted by apox View Post
    The rocker arm bolts are very stuck though! Any tips/tricks? I've tried the impact driver. Maybe need compressed air.
    If you mean the lock nuts on the screw adjuster, yes, they can get very tight. But the screw slot in the adjuster is easily damaged, so I prefer to hold the rocker arm and break the locknut loose first. On some engines (sorry, haven't got a Dommie), you can hold the arm carefully with Moles or similar and put a ring spanner on the nut, leaving a vee between them. Then grip both in the same hand and squeeze; this avoids a side-load on the rocker. You still risk marking the arm though, so another way is to put a hardwood wedge between the side of the rocker and the cam box, where the thread is. This also aims to hold the rocker while you crack the nut loose. If it's still tight, try heating the adjuster and nut gently, but let them cool before setting the gap.

    If you have a well-fitting ring spanner, they should come loose with a good tweak, but don't use an open-end; the nuts are quite shallow and round easily. If you can't get a ring on them, try a socket, but point the handle towards the centre of the engine; it reduces the leverage on the rocker arm without changing the torque on the nut. I don't use anything on these nuts other than engine oil, if they are dry.

    If the worst happens and the adjuster breaks, or the nut rounds, don't worry. You can saw the nut off, relieving the tension on the adjuster thread, which should then unscrew (put rags in to stop any swarf getting in the engine). Then buy a new adjuster and nut, and replace. I keep a couple of spare locknuts, as rounded ones are quite common. The size is common to lots of Hondas.

    When you tighten them, they are buggers for moving the screw while you tighten the nut. You'll need to hold the screw still with a screwdriver while you tighten the nut, but it might still move a fraction. Look (or feel) carefully to see how much, loosen the nut, back the adjuster off by that small amount, then re-tighten and check the clearance. Might take a few goes, but you soon get to feel when its moving, and trial and error soon tells you when it's right. Don't over-tighten it; you already know why! Good luck.

  11. #17
    Bobn's Avatar
    Bobn is offline Senior Member
    Join Date
    Apr 2011
    Location
    Derbyshire
    Posts
    671
    Thanks
    3
    Thanked 68 Times in 60 Posts

    Re: 48,000 miles. Valve clearances?

    That makes it sound a bit like hard work.
    I've never needed a mole wrench or bits of wood. Just use the ring end of a combination spanner and crack the nuts loose - don't worry about side loading the rocker arms, they're designed for it.
    I don't even know how you'd break and adjuster, been setting tappets for 27 years.
    The screw will probably rotate when you undo and when you tighten the nut, so when you've made your adjustment hold a screwdriver in position when you tighten the nut.
    Always rotate the engine (twice) and re-check the clearances before buttoning everything up.
    Current Fleet:
    1999 FX650 Red
    1999 FX650 Blue
    2001 FX650 Yellow
    2002 FX650 Blue
    2003 FX650 Yellow
    2003 FX650 Yellow
    1998 KE100
    Past rides: TTR600,XT600E, KLE500(*4),FX650(*7),SLR650(*4),DL650,KLE500,F650, G650X,XJ900,TDM850(*2),XJ600(*3),FJ1200(*2),GS750( *4),GS1000,Z1000,GSXR750(*4),R1100GS,R80,GT550,VX8 00,GT250,ETZ250,TS250,TS185,TS125,KE175,CB250RS,Z2 00,C90,ETZ125,TS350,FZS600(*3),FZR600(*3),FZ750,GS 550,Monkey125,T80,GP100,CD200,RD200,GN400,CX500 and many others I've forgotten

  12. The Following 2 Users Say Thank You to Bobn For This Useful Post:

    Bounder (22-05-17), Fitz (22-05-17)

+ Reply to Thread
Page 2 of 2 FirstFirst 1 2

Similar Threads

  1. Valve clearances
    By shepand in forum XR
    Replies: 1
    Last Post: 09-02-16, 02:04 PM
  2. Valve clearances
    By gebrauchtwagen83 in forum Transalp
    Replies: 1
    Last Post: 14-07-11, 12:49 PM
  3. Valve clearances
    By africatijn in forum Africa Twin
    Replies: 10
    Last Post: 18-06-11, 08:23 PM
  4. Valve Clearances
    By chronyx in forum Africa Twin
    Replies: 37
    Last Post: 01-04-10, 03:28 PM
  5. Valve clearances.
    By Chris J Barrett in forum Africa Twin
    Replies: 3
    Last Post: 14-06-05, 11:57 AM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts