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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Valve adjustment question /cgi-bin/YaBB.pl?num=1498544568 Message started by Garry on 06/26/17 at 23:22:48 |
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Title: Valve adjustment question Post by Garry on 06/26/17 at 23:22:48 I once had a BSA on which the recommended method of adjusting the valves was to turn the adjusting screw in until in touched the valve and then backing it out the correct part of a turn that equated to 0.005". On the BSA this equated from memory to 1/8 of a turn. This was an easy and accurate method that did not rely on trying to get feeler gauges in tight spots. All you need to know is the Turns per inch of the adjusting screw so that you can work out how much of a turn is required for the clearance. Does anyone know what the TPI of the adjusting screw in our engines is? |
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Title: Re: Valve adjustment question Post by kojones on 06/27/17 at 05:31:20 The nuts on the valve adjustment screws are 10mm and the thread doesn't look fine pitched, so it could be 1mm per revolution. Quite hard to turn it 1/12-1/8 turns. |
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Title: Re: Valve adjustment question Post by verslagen1 on 06/27/17 at 07:16:27 http://suzukisavage.com/cgi-bin/YaBB.pl?num=1477114768 |
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Title: Re: Valve adjustment question Post by Ruttly on 06/27/17 at 10:09:05 Get a feeler gauge set you cheap a$$ and then figure it out and lettuce know what you come up with ! Maybe 4 bucks ! |
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Title: Re: Valve adjustment question Post by Ruttly on 06/27/17 at 10:10:54 Sorry Dave I just lost it ! |
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Title: Re: Valve adjustment question Post by Garry on 06/28/17 at 01:10:48 Thanks to all who replied (even cheeky little Ruttly). The link Versy provided has all the answers and now I know the magic measurement is 90 degrees for 0.006" without having to waste four bucks on a set of feeler gauges! ;D |
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Title: Re: Valve adjustment question Post by Ruttly on 06/28/17 at 05:50:31 Precision measurements require precision tools , not some half azzed way of doing it. Do your cylinder head bolts the same way ? Oh that's tight enough ! I prefer to know it's done correctly right down to a knats a$$ ! I've owned many a BSA , still have one. |
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Title: Re: Valve adjustment question Post by kojones on 06/28/17 at 12:14:02 7478717877410 wrote:
0.006" is too much and it isn't 90 degrees if the thread pitch is 0.75mm. |
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Title: Re: Valve adjustment question Post by Ruttly on 06/28/17 at 12:17:09 4 Bucks |
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Title: Re: Valve adjustment question Post by justin_o_guy2 on 06/28/17 at 12:55:08 I would have to prove it to myself before I could be comfortable with a valve adjustment I didn't measure. |
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Title: Re: Valve adjustment question Post by verslagen1 on 06/28/17 at 14:41:32 30343134353E285B0 wrote:
0.006" is too much and it isn't 90 degrees if the thread pitch is 0.75mm. [/quote] http://www.savageriders.com/verslagen/ValveAdj/vvat-top%20view.jpg You'll note that there are a second set of lines. Those lines are for .005" So, that's less than 90°, but a little bit more than the calculated 60° :P |
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Title: Re: Valve adjustment question Post by Garry on 06/28/17 at 15:23:20 Thanks Versy. Yes I understood that. The 90 degrees for 006" is just a reference. Like you say around 60 degrees is close to the correct clearance. Main thing is to know how much clearance one complete turn gives so that the portion of a turn for the correct clearance can be calculated. Again thanks for the info. |
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Title: Re: Valve adjustment question Post by FL Savage on 06/28/17 at 17:00:59 72*, or 1/5 turn, would be .006" |
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Title: Re: Valve adjustment question Post by Ruttly on 06/28/17 at 19:30:09 So all you know I took the cheeky comment as a total complement! ;D ;D I think Garry hit the nail on the head ! 8-) |
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