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Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.

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Old 02-02-2010, 09:49 AM   #31 (permalink)
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Hello guys,

I have now some work on the engine and I am breakin' in.

I have port&polished head, high compression pistons (stock bore) and TPUSA 813s cams. I am using a good 2in1 exhaust system.

The jetting is as follows:

pilots 22.5
air screws: 3/4~1 turns from closed
needles 97
needle e-clip: middle position (out of 5)
main jets 142.5

I am currently using UNI foam pod filters UP4229

I have activated accel pumps (using leanest nozzle #50) but I haven't still tested WOT since I am breakin in the motor.

I would like to know your configuration and your experience with the accelerator pumps activated on these motors.

Thanks a lot.

BTW here's a photo of my bike:

Last edited by wolverine; 02-02-2010 at 09:52 AM.
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Old 02-02-2010, 01:57 PM   #32 (permalink)
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that's a damn fine bike! more pics!

Your jetting sounds close to mine, you might benefit from moving the needle clip up a postion or 2 (to make it leaner). That helped mine. I'm running the pumps too.
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Last edited by sweatmachine; 02-02-2010 at 08:33 PM.
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Old 02-02-2010, 06:23 PM   #33 (permalink)
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you are real close like sweat said you may or may not need to move the niddle lean one slot.As far as the pumps go you need them to come in at 1/4 throttle and end at 3/4 throttle.make sure the spray is dead on the center of the niddle niddle. All so check the slides at wot they should be dead even with the top of the bore and no highher or lower you can adj that with the stop screws .Mine where way off when i got them.
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Old 02-03-2010, 06:09 AM   #34 (permalink)
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Thanks Sweat.

Thanks Mike.

I will do some testing and report. I would like to use this post for us owner of HSR42mm. 'Cause I believe we are a few. So sharing info is useful.

Here some today's photos for you Sweat. Bike is not super-clean as in the other photo.




Last edited by wolverine; 02-03-2010 at 09:06 AM.
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Old 02-03-2010, 09:52 AM   #35 (permalink)
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There are lots of nice details on that bike. I really like the tach/gauge setup and the sidecovers.
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Old 02-04-2010, 02:16 AM   #36 (permalink)
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[QUOTE=wolverine;1475664]Thanks Sweat.

Thanks Mike.

I will do some testing and report. I would like to use this post for us owner of HSR42mm. 'Cause I believe we are a few. So sharing info is useful.


Very nice bike, I like the side covers too
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Old 02-04-2010, 02:19 AM   #37 (permalink)
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Must admit I like the HSR42's, but have been running the FCR39's for the last six months and have decided to stick with the FCR's so if anybody wants a set of 42's let me know

Don't forget I'm in Australia
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Old 11-22-2012, 08:55 PM   #38 (permalink)
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Hi
I have 2005 Speedmaster with Mikuni Screaming Eagle (HSR) carbs.
I try to tune them. Setup on two turns out. I read that it should start rough when i turn it too far out or in.
When i screw it in it dies what i assume is correct.
But I can take out the crew completely and bike still runs smooth.
idle 1300RPM. And popping on deceleration. What are your suggestions?
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Old 11-22-2012, 09:35 PM   #39 (permalink)
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If they came off a hd you have to big of pillot jets in them and main jets are more then likely to big.
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Old 11-22-2012, 10:58 PM   #40 (permalink)
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Quote:
Originally Posted by mikeinva View Post
If they came off a hd you have to big of pillot jets in them and main jets are more then likely to big.
Mikeinva, thanks again for help.
Tomorrow I'll write more questions.
I love triumhrat.net.
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