Author Topic: How to: Fit Yoshimura ST-1 Cams  (Read 20048 times)

Offline elderhome

Re: Fit Yoshimura ST-1 Cams
« Reply #30 on: Monday, 02 December 2019, 08:11 am »
Has anybody measured lobe center degrees from yoshi ST- 1 or std cams? Yoshi ST-1 brochure says 105/105 degrees, but measured degrees? How about lobe centers of std cams with std sprockets?

You got the point!  I did check the oem LC number is 100/103.5. If you just bolt on the ST-1 Yoshi camshat,  you will find out it is far away off from the recommended LC 105/105! You have to redegree it for the recommendation setup properly. But it is not easy for DIY,  please consult to ur mechanic or experienced engine builder. Don't be shy!
PS.  As I know most of people just bolt it on without degreeing,  engine runs without problem but not in a proper initial setup!
After installed,  it revs from mid to high with linear power output and reduce engine brake a lot!

Offline grog

  • Forum Donor 2022
  • Needs to get out more
  • ******
  • Location: landsborough
  • Posts: 6584
  • Country: au
  • Total likes: 6224
  • Gender: Male
  • If we werent all crazy, we would go insane.
Re: Fit Yoshimura ST-1 Cams
« Reply #31 on: Monday, 02 December 2019, 05:15 pm »
Not sure if this is a dumb question. Would the standard cams be dialled in perfectly, from the factory

Offline T 24

Re: Fit Yoshimura ST-1 Cams
« Reply #32 on: Monday, 02 December 2019, 07:26 pm »
Not sure if this is a dumb question. Would the standard cams be dialled in perfectly, from the factory
There are no dumb questions.
Standard cams are in standard position, and they aren't able to adjust with standard, unmodified, sprockets.
The timing can vary a bit, when the timing chain is wearing or the cylinder head surface has been grind.
Timing of my standard cams was 99°/104°, if I can remember correct.

Offline Snorre Kristoffersen

Re: Fit Yoshimura ST-1 Cams
« Reply #33 on: Friday, 30 October 2020, 04:34 am »
Has anybody measured lobe center degrees from yoshi ST- 1 or std cams? Yoshi ST-1 brochure says 105/105 degrees, but measured degrees? How about lobe centers of std cams with std sprockets?

You got the point!  I did check the oem LC number is 100/103.5. If you just bolt on the ST-1 Yoshi camshat,  you will find out it is far away off from the recommended LC 105/105! You have to redegree it for the recommendation setup properly. But it is not easy for DIY,  please consult to ur mechanic or experienced engine builder. Don't be shy!
PS.  As I know most of people just bolt it on without degreeing,  engine runs without problem but not in a proper initial setup!
After installed,  it revs from mid to high with linear power output and reduce engine brake a lot!
Hi! Do you remember how far from 105° the ST1 cam was at drop in? (did you have to adjust forward or backwards…?)

Offline The Stumeister

  • Starting Off
  • *
  • Location: Glasgow
  • Posts: 6
  • Country: gb
  • Total likes: 5
  • Gender: Male
  • LOUD MOUTHED HOOLIGAN!!
Re: Fit Yoshimura ST-1 Cams
« Reply #34 on: Tuesday, 04 January 2022, 11:20 pm »
Getting Yoshi cams fitted soon also. Is the running in time of just 300km enough...?
That's approx 180 odd miles and when running them in and keeping it under the revs as stated,will the bike still run fairly ok even tho the fuelling will be out etc..?

Offline seth

  • Forum Donor 2020
  • Needs to get out more
  • ******
  • Location: Near Perth in southern Scotland
  • Posts: 5476
  • Country: scotland
  • Total likes: 3435
  • Gender: Male
  • Near to Perth in Scotland
Re: Fit Yoshimura ST-1 Cams
« Reply #35 on: Wednesday, 05 January 2022, 03:13 am »
 :smile2:
500 miles total varied rpm but with these as a soft max revs
200 below 3000 rpm
200 below 4000 rpm
100 below 5000 rpm
Then an oil and filter change and dyno
Then full power available .
Not the law but this Is what I did and now got 30000 miles on mine since.
only a slightly modified gsx1400
oh and a standard one too

Sethbot Postwhore

 

SMF spam blocked by CleanTalk
anything