Resend my activation email : Register : Log in 
BCF: Bike Chat Forums


Fs1E tuning

Reply to topic
Bike Chat Forums Index -> The Workshop
View previous topic : View next topic  
Author Message

max
L Plate Warrior



Joined: 19 Mar 2005
Karma :

PostPosted: 17:04 - 19 Mar 2005    Post subject: Fs1E tuning Reply with quote

Has anyone got any tips for tuning these great little 50's or any other relevant info/ parts.
 Back to top
View user's profile Send private message You must be logged in to rate posts

stinkwheel
Bovine Proctologist



Joined: 12 Jul 2004
Karma :

PostPosted: 22:32 - 19 Mar 2005    Post subject: Reply with quote

A big-bore top end and spanny pipes were ever popular.

Big bore kits are available commercially for not much money. Cubes=ponies. It doesn't sound much going from 49cc to 60cc but it is more than a 20% increase in engine capacity.

A quick google reveals:

http://www.123bikes.co.uk/acatalog/XS_PARTS_BIG_BORE_KITS_405.html

and

http://www.bulltrikes.com/Links/Motorcycle_Big_Bore_Kits.htm
____________________
“Rule number one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
 Back to top
View user's profile Send private message You must be logged in to rate posts

ZRX61
Victor Meldrew



Joined: 05 Nov 2003
Karma :

PostPosted: 03:12 - 20 Mar 2005    Post subject: Reply with quote

Skim the head to decrease the squish & raise the top of the inlet port & transfer ports by about 2mm
 Back to top
View user's profile Send private message You must be logged in to rate posts

max
L Plate Warrior



Joined: 19 Mar 2005
Karma :

PostPosted: 08:47 - 20 Mar 2005    Post subject: Reply with quote

I got a big bore but cant find an expansion pipe at the moment.
 Back to top
View user's profile Send private message You must be logged in to rate posts

beans
Scooby Slapper



Joined: 12 Feb 2005
Karma :

PostPosted: 15:04 - 20 Mar 2005    Post subject: Reply with quote

Cut the rotery disc valve back, both the leading and following edges but not by much. This inscreases the amount of time the engine can take the mixture in for. Also try opening up the exhuast port up a bit.

A good de-coke will also help the bike no end, it always did with mine. Try and find an expansion chamber made by allspeed as these often had little or no baffles in.


Check out www.fs1e.co.uk for more tuning info.
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

jay12329
Dr. Evil



Joined: 02 May 2003
Karma :

PostPosted: 17:59 - 20 Mar 2005    Post subject: Reply with quote

Or you could spend less and buy a faster and more reliable 125.
J
 Back to top
View user's profile Send private message Send e-mail Visit poster's website You must be logged in to rate posts

beans
Scooby Slapper



Joined: 12 Feb 2005
Karma :

PostPosted: 18:29 - 20 Mar 2005    Post subject: Reply with quote

na theres actually some fun to be had tuning these if u already have a big bike. Balls rapped round ure arse 60mph screeming it for all its worth, crap brakes and handeling make it very intersting!!! An old classic 70s moped much fun to be had thrashing it, not like those gay scooters.
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

garth
World Chat Champion



Joined: 15 Dec 2004
Karma :

PostPosted: 22:38 - 20 Mar 2005    Post subject: Reply with quote

If you go on the fs1e forums, there is a tuning guide that has been posted up. I think it may be beeline racing or similar, which tells you how much to port it, to change the gearing etc. Worth a look.
____________________
http://noodleadventure.blogspot.co.uk/
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

bish777
World Chat Champion



Joined: 11 Nov 2004
Karma :

PostPosted: 02:53 - 21 Mar 2005    Post subject: Reply with quote

fit a YB100 engine as it will fit in, and that will give you 10ish HP.
____________________
GSXR1100J
 Back to top
View user's profile Send private message You must be logged in to rate posts

max
L Plate Warrior



Joined: 19 Mar 2005
Karma :

PostPosted: 18:27 - 21 Mar 2005    Post subject: Reply with quote

Cant ride anything bigger to young i know about FS1E.co.uk as i am the second top poster on there. Finding a micron/allspeed is almost impossible though
 Back to top
View user's profile Send private message You must be logged in to rate posts

beans
Scooby Slapper



Joined: 12 Feb 2005
Karma :

PostPosted: 18:52 - 21 Mar 2005    Post subject: Reply with quote

Get an expansion pipe made up! I remember talk on fs1e.co.uk of somebody getting the measurements for one and having a few made up by a specialist. TBH i dont think mine made much difference from the older standard pipe probably because i didnt change the jetting. I had an indecated 62mph out of mine once the rest of the time it would just scrape 55ish which is about normal for a standard old style fizzie. Best off doing a bit of porting work and try cutting the disc valve back abit. Big bores are a no go really unless you fancy putting a new big end in every few months, the engine unless you have re-biult it wont last long with a big bore.
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

bish777
World Chat Champion



Joined: 11 Nov 2004
Karma :

PostPosted: 05:43 - 26 Mar 2005    Post subject: Reply with quote

max wrote:
Cant ride anything bigger to young i know about FS1E.co.uk as i am the second top poster on there. Finding a micron/allspeed is almost impossible though


You dont have to tell the law you've got a YB100 lump in there lol

Plod wont notice!

Jeesh kids these days!
____________________
GSXR1100J
 Back to top
View user's profile Send private message You must be logged in to rate posts

Josh|RD125LC
World Chat Champion



Joined: 08 Sep 2004
Karma :

PostPosted: 20:04 - 27 Mar 2005    Post subject: Reply with quote

Keep us informed on your fizzy tuning as I am interested to see how it performs once it has been tuned. Should be fast once it has a nice big bore kit on. I hear some do 55mph stock so tuned they should fly. I would love to see the look on the scooter boi's faces when you blow them away. I did once consider getting a fizzy myself, but they turned out to be quite expensive. Good luck tuning the little beast Thumbs Up
____________________
Honda MBX50 | Yamaha RD125LC | Suzuki RG125F Lucky Strike | Suzuki GSF600S
RD125LC Pictures
 Back to top
View user's profile Send private message Send e-mail Visit poster's website You must be logged in to rate posts

max
L Plate Warrior



Joined: 19 Mar 2005
Karma :

PostPosted: 20:27 - 27 Mar 2005    Post subject: Reply with quote

I will keep you informed. What model 125lc have you got Josh a mk3 with powervalve?
 Back to top
View user's profile Send private message You must be logged in to rate posts

Josh|RD125LC
World Chat Champion



Joined: 08 Sep 2004
Karma :

PostPosted: 14:07 - 29 Mar 2005    Post subject: Reply with quote

No I wish. I have the Mark 1, which is quite nice, can hit 21bhp de-restricted Cool
____________________
Honda MBX50 | Yamaha RD125LC | Suzuki RG125F Lucky Strike | Suzuki GSF600S
RD125LC Pictures
 Back to top
View user's profile Send private message Send e-mail Visit poster's website You must be logged in to rate posts

max
L Plate Warrior



Joined: 19 Mar 2005
Karma :

PostPosted: 18:52 - 18 Apr 2005    Post subject: Reply with quote

My bike after some tuning is hitting 55mph on the flat and can get to 60mph+ downhill
 Back to top
View user's profile Send private message You must be logged in to rate posts

max
L Plate Warrior



Joined: 19 Mar 2005
Karma :

PostPosted: 18:54 - 18 Apr 2005    Post subject: Reply with quote

Still looking for a power pipe as i cant find one anywhere please please please somebody find me an allspeed.
 Back to top
View user's profile Send private message You must be logged in to rate posts
Old Thread Alert!

There is a gap of 1 year, 314 days between these two posts...

Solarlite
L Plate Warrior



Joined: 20 Oct 2006
Karma :

PostPosted: 17:21 - 27 Feb 2007    Post subject: Reply with quote

I have a Micron on mine, and it doesnt make a lot of difference, apart from the look, and noise.
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts
Old Thread Alert!

There is a gap of 2 years, 51 days between these two posts...

chas
L Plate Warrior



Joined: 28 Aug 2007
Karma :

PostPosted: 17:15 - 19 Apr 2009    Post subject: Reply with quote

So, are we still looking for answers? or has this thread had it's day?

With some of the cheap pattern big bore kits, the porting is so bad, it makes the bike slower. So, i went with an overbored genuine yamaha cylinder. Running it on the same setup as before, and only a slight improvement.
Does the carb need re jetting/ and if so, which size jet?
 Back to top
View user's profile Send private message You must be logged in to rate posts

J&E BIKES
L Plate Warrior



Joined: 10 Jul 2009
Karma :

PostPosted: 10:13 - 10 Jul 2009    Post subject: fs1e tuning Reply with quote

ok so im new on here but i thought id share this important tuning info with all of you
i used to have one when i was a kid of sixteen many aeons ago and later palyed with the motors , if you want power there is a way
firstlyu let me explain the port sustem partly the side ports int he barrel carry a flow of gasses across the piston side to side this is responsible for midrange power
there is also a port on the rear face of the barrel this is where it is interesting i had and have looked at many of the engines they are all resticted wait i hear you cry my 77 is unrestricted WRONG!! all of them have the same problem if you could call it that, the port on the rear is there but blocked at the casing if your brave remiove the barrel and file away the casing to the shape oif the gasket or better still use marking ink (bluing) to match the hole on the barrel with the case remove the alloy the rear port will then giver you top end ..ever noticed it seemed breathless and wouldnt quite rev out well it will after ..could somone let me know the top end before and after thanx ..happy tuning ps all the opther things are less of a tune than this coulple just this and a pipe ..dont mess with the valve unless you really know what your doing you can as my friend did make it misfire and work less well
 Back to top
View user's profile Send private message You must be logged in to rate posts
Old Thread Alert!

The last post was made 5 years, 140 days ago. Instead of replying here, would creating a new thread be more useful?
Display posts from previous:   

Post new topic   Reply to topic    Bike Chat Forums Index -> The Workshop All times are GMT
Page 1 of 1

 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum

Read the Terms of Use! - Powered by phpBB © phpBB Group
 

Debug Mode: ON - Server: peanuts (www) - Page Generation Time: 2.43 Sec - Server Load: 0.07 - MySQL Queries: 16 - CDN Objects: 46 - Page Size: 107.97 Kb