Rocker covers
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Hi
Does anyone know what year they used the finned rocker covers as in photo
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Heavy Twins
Description
A technical forum for Model 7 to Mercury
Push rods
Forums
I am midway into rebuilding the top end of my 1956 Dominator 99 and on checking the push rods I have found that one of the exhaust push rods is badly bent and the other three are scored. They are tubular aluminium with steel ends.
Can anybody please advise me what the correct overall length of the exhaust and inlet push rods are for the 99 and a recommended suppler of new ones.
I assume that the camshaft is standard although I have no history of it's previous rebuild. I have done approximately 400 miles on the bike since purchase earlier this year.
George
Primary drive - conventional or belt?
Forums
Hi,
I’m going to have to completely replace all of the drive side parts of my basket case Dommie 99 (1960). I’m dithering between a ‘conventional’ primary system or a belt drive system. I have no experience of belt drives but have suffered with a leaky primary in the past so would like to hear opinions on which type of primary drive people have used and what the pros and cons are.
Also, if anyone out there has real-time experience of fitting a belt drive to a Dommie, I’d be interested to hear how difficult it is to fit and how well it works.
Pushrod tunnel reboring or re-sleeving?
Forums
Does anyone have first-hand experience of having the pushrod tunnels either rebored with oversized followers or re-sleeved? (If that's possible) If they have then where did you get it done and was it worth it?
Valve spring length
Forums
Hi
im replacing the valve springs on a 1958 99 and the Hayes manual says the length should be
outer 1.700in
inner 1.531 in
which the ones I’ve taken off are just slightly shorter(reason for changing)
i ordered a set for a 500/600 part number 06.7174 put when they arrived are 2in long
any help on which part number I should be ordering
cheers Pete
1957 Model 88 Model 99 Featherbed frames are they interchangeable?
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I have a 1957 Model 88 Dominator. I need a replacement frame for it. I can purchase a 1957 Model 99 frame. Are the Model88 and Model 99 frames interchangeable.
plunger madel 7
Forums
Hello Every one.
This is my fisrt post so I hope this question has not been asked before. Does anyone know why my plunger model 7 handles ok when on twisty roads. But does not like going straight when on a straight road, it feels like there is a strong side wind that hits it in gusts. Also when slowing down from any speed above 30 the bike gives the feeling that the rear tyre is flat or there is oil on the rear tyre. Horrible feeling, I have checked the plunger arangement and the front forks and so far not found anything wrong. Any ideas what is wrong.
Ignition timing
Forums
Hi
I’m rebuilding a 1958 dominator the engine’s out and on a bench head off so nice and easy to get at everything
my question is should I set at 32 btdc or slightly retard it to suit modern fuels it has the standard auto advance on the mag
im trying to get it right first time cheers Pete
Valve springs
Forums
Hi
on dismantling a 1958 dominator 99 cylinder head I’ve found some fibre washers under the spring bottom cups that do not show on the drawing I have just wondering if they should be there or has some one added to tension springs