'Tis a sad day; 97bhp > 33bhp

[jay_666]

Well, i've just fitted my 33bhp restrictors to my new (to me) yamaha thundercat. It was fun doing it, but sad in a way.

Firstly i removed the fairing panels, seat and ram air covers.

https://w1.bikepics.com/pics/2006/09/29/bikepics-690378-full.jpg

Then i took off the fuel tank, making sure i turned the fuel tap off before. After that i removed the air box and checked the air filter whilst it was off the bike.

https://w1.bikepics.com/pics/2006/09/29/bikepics-690383-full.jpg

I then had to drain the coolant fluid. Ever seen your bike take a piss?

https://w1.bikepics.com/pics/2006/09/29/bikepics-690386-full.jpg

Then i pushed the 33bhp restrictors into the rubber.

https://w1.bikepics.com/pics/2006/09/29/bikepics-690385-full.jpg

To be honest, it was a lot easier to do than i thought it would be. The hardest part was slackening the clamps on the cylinder head intake rubbers. They were really awkward to see, yet alone get to!

Ready to be re-assembled:

https://w1.bikepics.com/pics/2006/09/29/bikepics-690377-full.jpg
____________________
CBT - Done | Theory - Passed | Test - 4th Oct [PASSED!]
https://www.bikepics.com/members/jay666/

[airpig]

Bet it will feel really weird!?

I've never tried to strangle a bike before, how does it feel??
____________________
Bikes are an addiction for which there's no rehab!!

[0ddball]

Hope you left the intake rubber clamps in an easier to get to position.

Have you ridden it yet?

[chris___]

I had the pleasure of doing that to my ZX6 when I brought it. What a shame the bike wouldn't run at all with them in, so out they came .

How come you had to drain the coolant?

Chris
____________________
Yamaha rxs100 > Kawasaki ZZR600 > Kawasaki ZX6R > Honda Hornet 600 > Honda Bros 400 > Suzuki SV650S K2
Bikepics page

[KevTM]

giving the poor bike asthma, feel sorry for yous!

[jay_666]

[fzr_400]

its well bad that this has had to happen, mine had restrictors in but ran really really bad and was black smoking as the bloke who put them in didnt adjust the fuel and air ratio's so it was trying to put the same amount through. Hope you pass your test and can finally ride the beast. See how it gets on and decide what to do afterwards.
____________________
Will b- Sv650s sport K6 in napolean blue and loving it -https://img.photobucket.com/albums/v499/EscortBoy1/jackson.gif

[palmer]

Restrictors look just wrong, they cant do the bike much good.

[tony532]

feel for you mate .

as written before will the carbs need reseting, and balancing e.t.c
____________________
bikes owned :-

aprilia rs125 - suzuki gsxr400rrsp 1990 - yamaha yzf600r thundercat - honda hornet 6

[jay_666]

[Danny]

[TheDonUK]

Do you have a licence? why dont you get on the bike and give it a little ride?...

[carlspann]

awwwww
the hose going to the carbs is to prevent carb icing and keeps the carbs nice and warm in winter.

[jay_666]

[greenmeanie]

whyyyy??? lol. if you are anything like me they will be out in a month lol.
____________________
Rh.

[Annabella]

At least having put them in yourself you know how to take them out


(or how easily they might fall out)
____________________
Avast! Pirates ahoy!
I did Cadwell!
www.bikepics.com/members/bella

[DaveH]

[quote="jay_666
Nope. Just put the tank and air box back on and it started up 3rd time with a bit of choke. Knocked the choke off after 30 seconds and its idling exactly the same as it did before it was restricted. It revved freely and still sounds exactly the same. Also, no dodgy smoke coming out of the exhaust.
[/quote]Wait til you try it under load though. Hardly any power (read air/fuel mix) required for the engine just to turn its self over when revving.

[V4]

What a waste, no one checks anyway

Leon

[steveh]

i ridden my thundercat round on full power for a month, then the insurance wrote to me and asked me to get it restricted, do i did, soon as it came out of the shop, 10 mins later they were out.


went for a scream down the coastroad to make me feel better, and theres the mechanic that did it sat having a brew with his mrs at the side of the road... oops.

he laughed and that was about it.

this is what mine are used for now....


Steve.
____________________
Current : 06 Zx10r, 07 Wr450f SM, 74 850 norton commando, 63 bsa b40, 1962 Triton 650, 67 Triumph Tr6r, 1955 Triton 750, 1978 TY250E.

[jay_666]

Went out for my first ride on it this afternoon.

I dont know what all the fuss is about

It doesn't bog down at low revs, and i had it go up to at least 8k! No flat spots, just a smooth power delivery

Because the most power bike i've ridden before this was a SR125 , as far as i can tell it doesn't feel restricted. Although i'm sure i'll have a shock when they come out
____________________
CBT - Done | Theory - Passed | Test - 4th Oct [PASSED!]
https://www.bikepics.com/members/jay666/

[alone]

I kinda of think of it like this-
Un-restricted it'll pull harder and harder through the range.
Restricted it'll reach a certain 'pulling power', then not pull any harder.

So, when you reach that point the bike would normally be giving you 34+bhp, it won't, instead it'll continue at 33bhp.

Another example; at 9,000rpm it might be making 40bhp normally, and accelerating faster. Whereas yours (and mine) will still only be making the horrid 33bhp and accelerating at the same rate as if held at 8,000rpm.

Now, I dunno how accurate I am. But that's certainly how it seemed. I got to ride my bike before its restriction, and after. and it appeared to make no difference till I hit 60/70mph,, and again a difference around the 6/7,000rpm mark.

[greenmeanie]

the bike might seem relativley normal in the low-mid rev range, but as soon as you get to the higher rev ranger where most unrestricted bikes produce the vast majority of there power, it will be as flat as a fart and bog down, when i had my er5 restricted i could get it to the top of 3rd with a struggle and as soon as it got to 4th it would start to die and not rev anymore, if u ask me this cant be healthy for a high revving engine?
____________________
Rh.

[chris-red]

The restrictor on my speed four is diffrent it actually limits the throttle movement, I only have 3rd throttle
____________________
Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.

[lewisonahisho...]

lmao yeah restrictors kits make ace keyrings. or engagement rings if your really cheap.
____________________
Test Passed - 13/09/06 - 2 lessons - 2 minors -
Previously Owned: Gilera Runner SP 125 2stroke/ Kawasaki AR125
Currently : Honda Cb1 400 Grey Import

[ram_doom]