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#863513 11/19/21 9:51 am
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I just ordered some ace bars. I just fitted old bars off something that were lying around the garage when I put it together. And the vibration in them is extreme.

I got out on it today finally. And took note of vibration 70 seems fine in top near 4,000rpm on superlight throttle it vibrates with throttle and overtaking in 3rd and 4th you are like a wind sock. The vibration is not in the seat or the pegs as rpm goes up, it's mainly in the bars but over 7,000 the light needs to be off.

I'm hoping the ace bars are a bit more suitable and resonate differently. And I may experiment with weights. I can understand why late models had bolts and rubber mounts for the bars. But really BSA should have rubber mounted the engine when building the OIF. It doesn't need to be like the Commando, and flex joints on the exhausts solve a lot. Taking vibration out of the frame can prevent cracking but it needs to be strong.

So many people look at the thing. I was talking to a guy and his wife about why the twin carb Thunderbolt head and pwks. He said I want to see you start it up. Which usually means the big one is definitely not going to go. But this is different, it goes through two with a full kick but this lights up at the first movement. And it's; 'Ah, beautiful.'

There are some lovely old MGs and Triumphs and Healy sports cars around here and they sound and look really nice. They used to look dated now they look very cool, and sound nice. They are not GT40s or Cobras, but really nice fun things. And the Firebird sort of fits in with that.

[Linked Image from i.postimg.cc]

I got two of these for around $1500 each in 1999 I think, and this was the worst so sat in the shed for 20 years. A '66 Spitfire would be good to do even with a later motor. Firebird pipes are good as they are not on the ground, or requiring the stands scraping. Not that it has a side stand.


mark
BSA on eBay
Mark Parker #863517 11/19/21 10:36 am
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Hi Mark, I used to have ace bars on my 71, they were good over 60 mph for comfort, cables and clocks restricted positioning, with smaller narrower mounted clocks it would have been easier. Vibes, I have rubber mounts that work now, back then they were not assembled correctly and there was a dirl that got tiring on long runs, softer grips and lead shot in the bar ends would help.


71 Devimead, John Hill, John Holmes A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Mark Parker #863552 11/19/21 7:35 pm
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Mark you are very lucky to have roads to reach 7,000rpm hard to find one near Birmingham laughing joking aside if my T140 was reaching those kind of revs there would be a few nut's n bolt's flying about


Always remember there are 3 kinds of people in this world,those that can count & those that can't.
T140V 1974
GT750 1974
GT550 1974
TL1000 97s
Mark Parker #863575 11/19/21 11:29 pm
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I have a 4inch x 14mm bolt covered with heatshink glued into the left side
of my bars it helped quite a lot at higher revs. The throttle side is ok but the
left was a pain about around 4500 and i don't like riding one handed for long
periods.
As the old lump has done around 25k miles now, it's getting a strip down next year
so i may get the crank spun up/balanced then.May even have to put some new bits
in, it's never had any new bearings etc from new.

NickL #863579 11/19/21 11:58 pm
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Nick you should try the Firebird, see if you'd like one of these heads. I have a spare.

I'm up for trying anything to quite down the bar ends. I have rods for it, just need to pull it all down and balance it.

[Linked Image from i.postimg.cc]


mark
Mark Parker #863580 11/20/21 12:12 am
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I know i'd like one of those heads, that's why i won't have one.

1 member likes this: JER.Hill
Mark Parker #863674 11/21/21 2:06 am
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Mark P, what are those rods (maker)?


Mark Z

'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
Mark Parker #863703 11/21/21 8:40 am
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MAP $450 a pair. They are in Ben's 750 and the outfit Matt races. And people pay for S/hand alloy ones? The little notch on the thrust faces puts oil up the bores and there is no drilling to weaken them.


mark
1 member likes this: Allan G
Mark Parker #863719 11/21/21 1:35 pm
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Re the ace bars. I have a set of Tomaselli adjustable Ace bars, they cost a packet and unless your about 6’4” they put you over the bars too much for road use, needed to do about 80mph before the wind was lifting me off the bars to take the weight off my wrists. It also made it a pain to manoeuvre the bike around the garage and harder to corner. If you had drop yoke fitted it would be worse.

I switched it out for the norman Hyde M bar, you can mount that either way up for about an inch of rise or Inch of drop. I have mine giving the inch of rise. With rear sets and clubman seat I find it very comfortable like this and just as aesthetically pleasing.

I acquired some ace bars also with not as much reach on them. Might fit them to my clubman/spitfire when it eventually gets done.


Now let’s all have a beer beerchug

68’ A65 Lightning “clubman”
71’ A65 823 Thunderbolt (now rebuilt)
67’ D10 sportsman (undergoing restoration)
68’ D14 trials (undergoing transformation)

Mark Parker #864258 Yesterday at 06:05 AM
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Bars on today. It now looks a bit more sporty in an old school way. I'll test them when the rain stops.


mark

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