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E: Engine Engine Valve Timing



powella

Website User
VOC Member
#1
Holding a DTI to set the valve timing - two styles of holding device.

First two photo`s used an old inspection cap with a turned insert held with " Lumiweld "

Last two photo`s show a fully turned holder.

No dimensions are given since this depends on the DTI . A word of caution , the Grub screw at the side needs only to be FINGER TIGHT otherwise damage to the shaft of the DTI will result ( been there already ! ). sales 88 013.JPG sales 88 015.JPG sales 88 007.JPG sales 88 002.JPG
 

stu spalding

Well Known and Active Website User
VOC Member
#5
Or you could thread a bit of aluminium round bar 1/4 BSP, bore it to suit the DTI shaft and glue it on with Loctite, it is then screwed into ET24/3 breather cap and locked with a thin locknut. Cheers, Stu.
 

BigEd

Well Known and Active Website User
VOC Member
VOC Forum Moderator
#6
While we have a thread for 101 ways to hold a dial gauge;;) the above are wonderful with the engine out.
Let us see some configurations for with the engine assembled and installed in the bike.:cool:
(Or someone do the search and point us to the best threads that already show this.)
 

greg brillus

Well Known and Active Website User
VOC Member
#7
DTI and magnetic base attached to the oil tank set at the tappet adjusters. This does not give as accurate a reading as over the valve method, and it also will not show the true lift at the valve. Example........A Mk 2 cam showing 0.330" at the cam lobe will generally show 0.380" at the inlet valve.
 

vibrac

Well Known and Active Website User
VOC Member
#8
DTI and magnetic base attached to the oil tank set at the tappet adjusters. This does not give as accurate a reading as over the valve method, and it also will not show the true lift at the valve. Example........A Mk 2 cam showing 0.330" at the cam lobe will generally show 0.380" at the inlet valve.
But it will show the point of equal lift....
 

BigEd

Well Known and Active Website User
VOC Member
VOC Forum Moderator
#9
DTI and magnetic base attached to the oil tank set at the tappet adjusters. This does not give as accurate a reading as over the valve method, and it also will not show the true lift at the valve. Example........A Mk 2 cam showing 0.330" at the cam lobe will generally show 0.380" at the inlet valve.
That is how I've done too and the equal lift at 4º BTDC method works for virtually any cam configuration.:)
 

ClassicBiker

Well Known and Active Website User
VOC Member
#10
While we have a thread for 101 ways to hold a dial gauge;;) the above are wonderful with the engine out.
Let us see some configurations for with the engine assembled and installed in the bike.:cool:
(Or someone do the search and point us to the best threads that already show this.)
You Mean Like this? Good quality magnetic bases on the UFM, taking care to make sure the indicator shaft is co-axial to the pushrods. When done I replaced the standard tappet adjustment screw with the allen key version sold by the club.
Steven

100_2939.JPG
 

BigEd

Well Known and Active Website User
VOC Member
VOC Forum Moderator
#11
You Mean Like this? Good quality magnetic bases on the UFM, taking care to make sure the indicator shaft is co-axial to the pushrods. When done I replaced the standard tappet adjustment screw with the allen key version sold by the club.
Steven

View attachment 25064
Nice. The digital gauges are quite cheap to buy and when you are doing it by the equal lift at 4º BTDC method they are much better to read as with dial gauges the needles are moving in different directions.o_O
 

ClassicBiker

Well Known and Active Website User
VOC Member
#12
Agreed. They only cost $30 or $40 dollars each. Before I used them I mounted each of them on my lathe with digital read out to check accuracy. No problems there. The bases I already had. So all in all $80 well invested I think.
Steven
 

powella

Website User
VOC Member
#13
Thanks for the replies.
Note to Steven - Both DTI`s showing 090 now that really is valves " Rocking " ! Only joking.
Do the DTI`s have a Zero out button and do they show + and - sign`s ?
Christmas wish list I think.

Regards Alan.
 

MartynG

Well Known and Active Website User
VOC Member
#15
See OVR #39 for a detailed description of "How To" and more. Available in the OVR Archive
 
Last edited by a moderator:

ClassicBiker

Well Known and Active Website User
VOC Member
#16
Thanks for the replies.
Note to Steven - Both DTI`s showing 090 now that really is valves " Rocking " ! Only joking.
Do the DTI`s have a Zero out button and do they show + and - sign`s ?
Christmas wish list I think.

Regards Alan.
Yes, they have a zero button and once zeroed will show a - sign if indicator shaft moves down after zeroed.


Think mine cost £26 the pair from China.
These are from China also. £26 a pair really is a good deal.

Steven
 


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