727 it runs!
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Please can you post items for sale or wanted in the correct For Sale section. Items / bikes for sale here will be removed without warning. Reasons for this are in the FAQ. Thanks
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Thunderbike_steve
- Settled in member
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- Joined: Wed Oct 15, 2008 2:16 pm
- Location: Lincoln
727 it runs!
Hi all.
I finally got the 727cc'd 3tj motor fired up today. For those who don't know it was my plan to race this 2 years ago but sadly with family circumstances I've had to delay a while.
It's basically an old long throw crank from the 3he fzr600 in 400 engine cases with a thundercat top end bored out 3mm. But believe me there's more that goes in to it than you think.
Anyway she fired up pretty easy after 2 days pissing around with the race loom I made to finally realize I hadn't shorted out the side stand. Sounds a lot more grunty than a thunderkitty motor. Hoping to have it on a dyno in the next couple of weeks and have it ready for my first race at Brands in mid April.
I finally got the 727cc'd 3tj motor fired up today. For those who don't know it was my plan to race this 2 years ago but sadly with family circumstances I've had to delay a while.
It's basically an old long throw crank from the 3he fzr600 in 400 engine cases with a thundercat top end bored out 3mm. But believe me there's more that goes in to it than you think.
Anyway she fired up pretty easy after 2 days pissing around with the race loom I made to finally realize I hadn't shorted out the side stand. Sounds a lot more grunty than a thunderkitty motor. Hoping to have it on a dyno in the next couple of weeks and have it ready for my first race at Brands in mid April.
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Drunkn Munky
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- Bike owned: NC30 MC21 TZR FZR GSXR RG MITO
- Location: Kent
Re: 727 it runs!
727cc in a 400 frame, my kinda bike 
What date you at brands, im only up the road and gota see this
What date you at brands, im only up the road and gota see this
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hunter
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Re: 727 it runs!
Now this sounds interesting,It's been a plan of mine to do this to. 
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Evilchicken0
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- Joined: Tue Apr 29, 2008 8:59 pm
- Bike owned: Bimota SB6 Yamaha FZR 3TJ x2
- Location: Lundin Taan
Re: 727 it runs!
F*ck yeah - I remember this one - you had to get a spacer plate made for the base gasket.
It' runs !!!
That's cool - so tell us when your at Brown Snatch and I'll try and get there too.
Well done matey
It' runs !!!
That's cool - so tell us when your at Brown Snatch and I'll try and get there too.
Well done matey
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Thunderbike_steve
- Settled in member
- Posts: 76
- Joined: Wed Oct 15, 2008 2:16 pm
- Location: Lincoln
Re: 727 it runs!
Yes Boris I did indeed need the spacer gasket. I forget the size now but it cleared the extra length of the YZF rods on the fzr crank and reduced compression ratio to 12:1. I never doubted my maths in calculating it honest 
I think Brands is the weekend of the 14th April.
Few other things about it, it has a 2006 zx6r front end with r6 calipers. SRAD 600 swinger (Thats because its only 10mm longer than the 3tj one) Carrozzeria race wheel, pfm iron brakes, bdk tail unit and fairings will be TZ250 gp. I'm hoping its gonna be better than last time I raced it.
I think Brands is the weekend of the 14th April.
Few other things about it, it has a 2006 zx6r front end with r6 calipers. SRAD 600 swinger (Thats because its only 10mm longer than the 3tj one) Carrozzeria race wheel, pfm iron brakes, bdk tail unit and fairings will be TZ250 gp. I'm hoping its gonna be better than last time I raced it.
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Evilchicken0
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- Posts: 5374
- Joined: Tue Apr 29, 2008 8:59 pm
- Bike owned: Bimota SB6 Yamaha FZR 3TJ x2
- Location: Lundin Taan
Re: 727 it runs!
3 or 4 mm spacer with Hornet pistons ???
Was it you that had a RAF roundel on the bike .... ?
Anyway I'll pencil it into my diary
Was it you that had a RAF roundel on the bike .... ?
Anyway I'll pencil it into my diary
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CRM
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thunderace
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- Joined: Fri Sep 10, 2010 9:03 pm
- Bike owned: R6, YZF600R
- Location: Blackburn, Lancs.
Re: 727 it runs!
Where did you plan on racing it? What class? 
Conventional wisdom says to know your limits. To know your limits you need to find them first. Finding your limits generally involves getting in over your head and hoping you live long enough to benefit from the experience. That's the fun part.
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CMSMJ1
- Moderators
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Re: 727 it runs!
Thunderbike_Steve..
Thunderbikes then
I want a 727cc 3TJ too
Thunderbikes then
I want a 727cc 3TJ too
IMPERATOR REX ANGLORUM
The V4 is the law..
NC30 - No9 - my old mate
The V4 is the law..
NC30 - No9 - my old mate
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thunderace
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Re: 727 it runs!
CMSMJ1 wrote:Thunderbike_Steve..
Thunderbikes then
I want a 727cc 3TJ too
Hey! It's still early and I'm still fooked after yesterday
Conventional wisdom says to know your limits. To know your limits you need to find them first. Finding your limits generally involves getting in over your head and hoping you live long enough to benefit from the experience. That's the fun part.