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by camstevens
Sat Jan 02, 2021 11:41 am
Forum: Four stroke
Topic: 50T rear brake drum
Replies: 3
Views: 252

Re: 50T rear brake drum

With regards to the option of finding a 7" brake plate to match the 1950 5-stud QD unit, can a brake plate from previous years/models be appropriated to match? For example I see Drags make a replacement plate 4360-42 for rigid frames. I wonder if other folk on here have been through this proces...
by camstevens
Thu Dec 31, 2020 7:47 am
Forum: Four stroke
Topic: 50T rear brake drum
Replies: 3
Views: 252

50T rear brake drum

Hi Al Curious one, but my MK1 had been fitted with an 8" drum on the 5-stud QD unit, which is not original. I counted (and yes, I tripple-checked) the sprocket teeth to be 50, so the bike has somewhat longer legs. I have been keeping my eye out for a 7" QD unit that is fitted with the 47T ...
by camstevens
Sun Nov 01, 2020 7:38 am
Forum: Four stroke
Topic: Mk1 Lucas Coil Output Resistor
Replies: 6
Views: 338

Re: Mk1 Lucas Coil Output Resistor

That's interesting... didn't realise it was actually a legal requirement. I imagine to avoid annoying interference in adjacent cars and buildings?
by camstevens
Sat Oct 31, 2020 9:59 pm
Forum: Four stroke
Topic: Mk1 Lucas Coil Output Resistor
Replies: 6
Views: 338

Re: Mk1 Lucas Coil Output Resistor

Hi The distrubutor cap is standard.....the supressor unit fits as an add-on directly between the coil lead and distributor cap. I never picked up on it before as it's the same material / colour as the cap. My leads and caps do not have supressors. If it is not adding any value I would rather remove ...
by camstevens
Sat Oct 31, 2020 7:29 pm
Forum: Four stroke
Topic: Mk1 Lucas Coil Output Resistor
Replies: 6
Views: 338

Mk1 Lucas Coil Output Resistor

Hi All Taking a close look though the MK1's distributor system (as part of recommissioning) I found that the distributor cap has a choke/resisitor fitted to the coil input. I've not seen this fitted to other bike's and the Drags site doesn't seem to promote them, so I'm wondering what it's purpose i...
by camstevens
Mon Oct 12, 2020 6:43 pm
Forum: Four stroke
Topic: sq 4 oil pressure....
Replies: 15
Views: 1974

Re: sq 4 oil pressure....

simon.holyfield wrote:I use Penrite 25W/70 in my Mk1. 75 psi cold, independent of engine speed; 55 psi hot running; 25 psi hot idle.


Hi Simon
25w70 does sound like a prudent option. Did you run this grade when the engine was newly rebuilt? Would a higher viscosity at running temp help or hinder running in?

Cam
by camstevens
Tue Sep 29, 2020 7:56 am
Forum: Four stroke
Topic: New MK1 cam - have missed a trick?
Replies: 9
Views: 660

Re: New MK1 cam - have missed a trick?

Thanks John
Yes, I'll be setting the timing this weekend. I'll map out the profile using a DTI......will be interesting to see if the ramp is clear on the profile (prior to lift)........will revisit the advice sheet.

Regards
Cam
by camstevens
Sun Sep 06, 2020 7:34 pm
Forum: Four stroke
Topic: New MK1 cam - have missed a trick?
Replies: 9
Views: 660

Re: New MK1 cam - have missed a trick?

Thanks, understood

C
by camstevens
Sun Sep 06, 2020 6:03 pm
Forum: Four stroke
Topic: New MK1 cam - have missed a trick?
Replies: 9
Views: 660

Re: New MK1 cam - have missed a trick?

Thanks Johnny, I'm just being uber cagey this time. I do have the timing sheet which includes the required clearances....the cam I was given was old profile, but I had set the clearances to the later profile with loading ramps. I'm not sure that would have had a massive effect on performance, but wo...
by camstevens
Sun Sep 06, 2020 5:32 pm
Forum: Four stroke
Topic: New MK1 cam - have missed a trick?
Replies: 9
Views: 660

Re: New MK1 cam - have missed a trick?

Interesting. My lobes do not have the clean machines finish as shown in Paul's photo. My lobes themselves have the dull, grainy finish.

C

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