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PostPosted: Sun Aug 20, 2017 7:32 am 
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Location: Lancaster Pa.
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Bikes owned: GT750 x2 97 -1200 Bandit 86 GSXR1100
Chamber rear mounts dont have to be where the pipe builders put them .

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PostPosted: Sun Aug 20, 2017 4:17 pm 
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I cannot recall if the 500 rear chamber mounts are rubber mounted ?

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PostPosted: Sun Aug 20, 2017 5:47 pm 
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Location: North of Albany, NY
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Bikes owned: T500R (now), T500M (30 yrs ago)
Stock pipes - No.


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PostPosted: Sun Aug 20, 2017 5:57 pm 
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ConnerVT wrote:
Stock pipes - No.
Sure enough :up: and the engine is hard mounted to isnt it ? But then the handle bars are rubber mounted ?

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PostPosted: Sun Aug 20, 2017 6:02 pm 
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Yes. If I remember, there is a thin rubber between the actual case and a sleeve that runs through it. But then you put some hard spacers to fill the gap between the frame and the case. So, yeah, pretty hard mounted.

The front header pipes are a hard mounted flange as well (none of those springy things here!). So in all, everything is bolted solid to the cradle frame.

handle bars do have a rubber mount. They added rubber to the late model mirrors as well. I never notice any vibration in the bars (well, no more than any bike). But the foot pegs get a but buzzy at high RPM.


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PostPosted: Sun Aug 20, 2017 7:21 pm 
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Location: Lancaster Pa.
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I have seen the topics where the GT750 rubber engine mounts have been adapted to the 500 engine cases .

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PostPosted: Mon Aug 21, 2017 2:11 am 
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Location: southwestern Pennsylvania
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Bikes owned: 69 T350 thru 75 GT750
Has anyone asked the Higgspeed guys about rubber mounting?

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Suzuki:
GT750 2x75
GT550 72 project & 75
GT380 72
T500 73 project
T350 69, 71 & 72 project
T250 72
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE


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PostPosted: Mon Aug 21, 2017 5:12 am 
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jabcb wrote:
Has anyone asked the Higgspeed guys about rubber mounting?


I contacted David Higgs directly and told him about the cracking and then asked him about rubber mounting. This was his rather basic reply:

Hi Steve,
sorry to hear about that. The T500 is notoriously vibey and this vibration is what causes the cracks. Please return the pipes and i will repair and strengthen them free of charge.
cheers
David


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PostPosted: Mon Aug 21, 2017 11:31 am 
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Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
sbaugz wrote:

Hi Steve,
sorry to hear about that. The T500 is notoriously vibey and this vibration is what causes the cracks. Please return the pipes and i will repair and strengthen them free of charge.
cheers
David

I guess you can't say much fairer than that under the circumstances, but its a bit of a bummer that this was not factored into their design in the first place. I wonder if in future you could mount them using a rubber grommet with a metal sleeve through it to allow the pipes some freedom of movement?


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PostPosted: Mon Aug 21, 2017 11:32 am 
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Location: southwestern Pennsylvania
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The Higgspeeds for the GT250 cafe project cost around $110 to ship from the UK. Or about $220 for the round trip to get your’s fixed.
I would be inclined to send them the pipes so that they can see what happened & appropriately strengthen them. This probably also benefit future buyers.

Hopefully the vibey comment suggests that the solidly mounted GT250 pipes are OK.


I came up with a solution for the custom oil tank. They provided a 1/8” MNPT fitting for the oil line. I got a fitting from an autoparts store that has a barbed connector for 1/4” hose. Used 3/16” yellow tygon, which is fuel & oil compatible. It seal nicely on the stock oil pump fitting & is stretchy enough for the barbed connector. The line turns dark when its full of oil so the color isn’t a problem.

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BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

Suzuki:
GT750 2x75
GT550 72 project & 75
GT380 72
T500 73 project
T350 69, 71 & 72 project
T250 72
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE


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PostPosted: Mon Aug 21, 2017 3:17 pm 
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Location: Wales UK
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Bikes owned: RG250 GT750L GT750 DRAG seelyt500 tr500MK3
Why not ask Higgs to make and send you a new pipe,
I'm sure with a bit of discount and one way postage it may work out.
It's worth asking.


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PostPosted: Mon Aug 21, 2017 3:38 pm 
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Location: Lancaster Pa.
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jabcb wrote:

Hopefully the vibey comment suggests that the solidly mounted GT250 pipes are OK.
I would be inclined to try and soft mount any rear chamber hanger . If nothing else to stop some of the vibration getting to the bikes frame too .

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PostPosted: Tue Aug 22, 2017 10:23 am 
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Suzukidave wrote:
jabcb wrote:

Hopefully the vibey comment suggests that the solidly mounted GT250 pipes are OK.
I would be inclined to try and soft mount any rear chamber hanger . If nothing else to stop some of the vibration getting to the bikes frame too .

I concur, you should always have some flexibility on an exhaust pipe. Where there is insufficient flexibility you will always find either joints rattling loose or stress cracks, or both.


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PostPosted: Tue Aug 22, 2017 10:48 am 
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Location: Trowbridge UK
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Bikes owned: T500R, SV1000S, TS125, Seeley T500
I think you should have some form of rubber isolation mounting for the rear mount on a pipe if you can manage it. I have used these to good effect. You can also get them in male/female and female/female configuration, all with an 8mm thread. A 10mm spanner shown for size comparison.

Cheers Geoff

Image


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PostPosted: Tue Aug 22, 2017 11:12 am 
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Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
Zunspec4 wrote:
I think you should have some form of rubber isolation mounting for the rear mount on a pipe if you can manage it. I have used these to good effect. You can also get them in male/female and female/female configuration, all with an 8mm thread. A 10mm spanner shown for size comparison.

Cheers Geoff

These a great, but it should be noted that if you use them for many years or get poor quality ones, when the rubber breaks away your exhaust can fall off. But if you regularly inspect them, this is easily avoided.


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