pulling the trigger on a 120 r next month

[JJTRIKER]

PULLING THE TRIGGER ON A 120 R NEXT MONTH
tHE Dealer ship is making me one helluva trade for my 103 .
anyone have a dyno for a 120 on a trike?

 

[eighty80]

Yup, but it doesn't show the AFR...........

Do you mean a dyno print-out (sheet) or a dyno machine that will dyno a trike?

 

[FLTR2008TRIKE]

Are you planning on riding solo?? The 266 cams that come in the 120R are slugs until you get north of 3k rpms even more if your riding 2 up..... just sayin

 

[Rick Kay]

Congratulations! Keep us posted!

 

[SEAlaskan]

Just wondering!!
I now have the SE120R mounted in my Tri Glide (only 361 miles on it) and was wondering what would be a good cam for the engine trike combo? I do ride 2 up and us it for touring. Would like to move the torq. more to the left, below 2000 rpm if possible.
Butch

 

[FLTR2008TRIKE]

Below 2000 and your risking the flywheels not lasting. The 120r is a 4 5/8" stroke. To keep some longevity you need to keep your rpms above 2500 after 2nd gear.

The S&S 585 cams come in the low compression 124" that or the Feuling reaper 575 cams ( I think that's the right can number)

The 266 cams need close to 12:1 compression to work correctly. The 120r is right around 10.5:1.

The custom cams in my 124" would do well in your 120 as well

Tom

 

[SEAlaskan]

Below 2000 and your risking the flywheels not lasting. The 120r is a 4 5/8" stroke. To keep some longevity you need to keep your rpms above 2500 after 2nd gear.

The S&S 585 cams come in the low compression 124" that or the Feuling reaper 575 cams ( I think that's the right can number)

The 266 cams need close to 12:1 compression to work correctly. The 120r is right around 10.5:1.

The custom cams in my 124" would do well in your 120 as well

Tom

Coool!! You think maybe the S&S 585 or Reaper 575 cams. I would be happy with torq coming in at 2000 rpm. I've been trying to keeping the rpm around 2800 above 2nd gear, to me the engine feels happy at around 28-3000 rpm. I also would like to be able to use lower grade gas if needed.
Butch

 

[FLTR2008TRIKE]

With the cams I listed your long stroke engine needs piston speed to produce power. So with that said you do not want to make a lot of engine torque at 2000 rpms. 2300 - 2400 would be the range these cams would start to pull and be better for the flywheels.

Keep 2 things in mind

1) don't lug the 120 engine. Constant low rpm lugging will shorten the life of your engine

2) with a long stroke engine you want smooth torque power to pull the trike. Having the torque hit hard early makes the trike harder to ride giving you erratic touchy sensitivity at low speeds.

Tom

,

 

[SEAlaskan]

With the cams I listed your long stroke engine needs piston speed to produce power. So with that said you do not want to make a lot of engine torque at 2000 rpms. 2300 - 2400 would be the range these cams would start to pull and be better for the flywheels.

Keep 2 things in mind

1) don't lug the 120 engine. Constant low rpm lugging will shorten the life of your engine

2) with a long stroke engine you want smooth torque power to pull the trike. Having the torque hit hard early makes the trike harder to ride giving you erratic touchy sensitivity at low speeds.

Tom

,

If I read the speck sheets right:
Feuling's cam 574, torq comes in at around 2100 and ends around 6500 rpm
S&S's cam 585, torq comes in at around 2500 and ends around 5500 rpm
So if I'm under standing this right, the S&S 585 cam would the better cam for this engine?
Butch

 

[JJTRIKER]

I withdrew my order on the 120 today until we get belt issues addressed and fixed.