derestricting a Suzuki TS50

[M1ke]

Well I have had the exhaust off and the carburettor out now to see if the restrictor is in there. I just can’t find it

If there was a restrictor in the carburettor, would it have been obvious? I didnt really know what i was looking for. I took it off and basically turned the throttle to make sure that the plate went all the way up and down.

Someone told me that there are three restrictors in the TS50, so if its not in the exhaust, or carburettor, where else is there?

[Kickstart]

Hi

Maybe they just fitted a tiny carb

Anything on a Google search

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[M1ke]

Nothing on google, jeeves or geocities

There is hardly anything written about the TS50 full stop, they seem quite rare!

[Doddmaster]

My sister bought a TS50 today bloody great fun to ride!

The best thing to do is get an 80cc top end for it, really cheap and makes a hell of a difference

[M1ke]

Now you know why i bought another TS50 I have been using it around the local field and its great fun.

Still cant find this damn restrictor, it only does 35MPH

[FLASH]

i had a dt 50 that was great fun !!! i fitted a big bore kit that cost me £40 and a ty 80 carb rejetted it and i also fitted a dep end can and a after market front pipe was it LOUD !!!! and it did 60 mph ultimate moped killer !!!!!!!!
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RD 350 YPVS

[M1ke]

Where could one purchase a big bore kit? I have never seen them advertised. The down side is, is that its never as fun when its legal riding a 50cc bored out at the age of 16 would be so much more fun!

[Kickstart]

Hi

M&P list the big bore kits. Old catalogue I have here lists them at £46 for a TS50ER and £75 for a TS50X (doesnt include gaskets)

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[cagiva gezzer]

They are restricted by having-

12mm, maybe 10mm carb

Tiny airbox.

very conservative port timing.

Very restrictive exhaust with baffles inside the expansion chamber which cant be removed, unless you cut it open. Plus a crap can.

Buy a big one, or DEP or similar expansion chamber and matching can. Get it jetted to suit and you might hit 4, or EVEN 5 BHP.

Raise the exaust port, and it will hit 45mph.

THEN you have the problem of piss poor brakes and super soft suspension.

In short, easiest thin is a new exhaust system.

Could try carbon reeds, but they wont make any difference unless you have the exhaust done. Plus, the intake is part part piston ported and part reed controled, so i doubt the reeds will make much difference.

Good luck.

Stu.
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"because one stroke isnt enough and four strokes waste two"

[M1ke]

My last one had an aftermarket exhaust like you say and that used to do about 45MPH to 50MPH.

I also noticed that the brakes are crap! Practically none existent. I bought some new brake pads/shoes for my last one thinking that the brakes had gone but it made no difference. My current one may as well have no brakes at all, you have to use the gears to slow you down.

Thanks for your post it is very useful I would give you some karma but I have none to give

Cheers
newbie

[Scotty]

Let me push you along! :d

Anyway, go for the big bore kit! That'll see a much faster accleration at least. You might have to change the front sproket to something bigger to get a higher top speed.
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Regards
Scott

[cagiva gezzer]

A big bore kit will just mask the other restrictions.
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"because one stroke isnt enough and four strokes waste two"

[cagiva gezzer]

More thoughts, might be too complicated for your liking.

Found it on another site, but it builds on the fact that the engine is part piston and part reed ported.

The gist of it is that the TS50 operated with only half its intended intake system. The rest of the TS/RM range of the same age used an inlet system that had a half block crankcase reed as well as piston porting.
Your TS only has the reed- it was part of the way that they were restricted. To get it back to the original design you need to make a cutaway in the skirt of the piston to allow the gas to flow into the crankcase without going through the reed. It should start to open about 20 deg after bdc.

Basically, you need a hole in the back of the piston to allow mixture to be taken in to the crankcases, without going through the piss poor tiny reed block.

Good luck.
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"because one stroke isnt enough and four strokes waste two"

[Scotty]

Isn't that a little complex, and you'd end up friging it up...
Destroying ports and piston if you messed it up?
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Regards
Scott

[cagiva gezzer]

Nope.

Get piston.

Machine ports into the rear skirt, like it was ment to. Clean it up so there isnt any sharp edges.

Put it back in.

If youve managed to get it wrong, it will just run a bit strange.

Worst thing that can happen -

waste 20 quid on gaskets and a piston.
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"because one stroke isnt enough and four strokes waste two"

[M1ke]

I will have to look into all of this, sounds like some good ideas Has that site got any schematics for where the holes/shape/size needs to be on the piston? I could then take it along to the local engineering place and I bet they would do it for next to nothing.

Once the aprilia is back in one piece I may have to have an experiment with the TS50. I am pretty sure that my parents would get a bit pissed off if I had two bikes in pieces!

Cheers
Newbie

[cagiva gezzer]

You have to be a member of the site, but thats no prob. Just sign up.

https://www.macdizzy.com/ubb/ultimatebb.php?ubb=get_topic;f=14;t=000074#000000

https://www.macdizzy.com/ubb/ultimatebb.php?ubb=get_topic;f=14;t=000011#000013

Should work.
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"because one stroke isnt enough and four strokes waste two"

[M1ke]

It says that they have to approve me before im allowed in, and that takes a few days it says. I will have to wait

[M1ke]

I was just searching ebay and came across this piston for the TS50

https://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=2416195039&category=10534

I was wondering if the hole in that is what you are talking about? So the standard one thats in the bike at the minute doesnt have that hole?


Also there is an oversized piston kit for the TS50
https://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=2416119587&category=10534
Would that fit straight into my bike or would i need the barrel to be bored/replated?

I have been trying to find a website that do TS50 exhausts, but i cant find any can anyone suggest a site?

Cheers
Newbie

[Scooby]

You would need a 0.5mm rebore mate.
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A big enough hammer fixes anything!

[Scooby]

Oh, and with regard to the exhaust, I think if you look in Big Bike Book there is an aftermarket exhaust for the TS50 made by BigOne.

Try... Http://www.bigbikebook.com (or .co.uk?)
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A big enough hammer fixes anything!

[cagiva gezzer]

its the best pic i can find in this short amount of time.

https://www.macdizzy.com/1989jhopup.htm

The piston is upside down, and placed in the cylinder.

The holes are the widows in your piston which you are missing. Two large holes at the back.
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"because one stroke isnt enough and four strokes waste two"

[spike1989]

Hey I’m new to this forum but I am in the same position as M1ke and I have a question in regards to the “piston porting”. and the “big one exhaust” so I’ll start from the top.

Could I get a ported piston from a bike shop/ eBay. or do I have to do it myself / get a
Engineering shop to do it for me?

“The big one” I’m going to get one over the next week or so and I was wondering if I would have to alter the fuel/air mixture before I start driving it


Any help would be much appreciated many thanks.
spike
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hardcore till i die!

[Trip]

[edd]