44 bhp :o

Who's zxr400 is kicking out the most BHP? show off your mods and your dyno printouts.

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alanh
Posts: 100
Joined: Fri Jul 23, 2010 10:50 pm
My Bike: zxr400 L racebike/R1

44 bhp :o

Post by alanh »

Had my bike on the bemsee dyno, coughed out 44bhp running rich as hell all the way through. Switched carbs to a set with corrector jets blocked off, took filter out and runs a lot better so got some dyno time booked on Thursday, will update. Motor is stock apart from base gasket and flywheel/generator removed. Bike is running in sub 64 class so need another 20hp, if all else fails I've just acquired an ex race motor with adjustable inlet , ported head etc. But was trying to save that for running full power next season
zxr400L Race Bikes Competing in EDIASIA F400 and thunderbikes with BMCRC in 2016 and an RD125LC MK1 restoration project
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mick41zxr
zxr400 oc member
zxr400 oc member
Posts: 170
Joined: Wed Jan 14, 2009 4:07 am
My Bike: ZXR400sp

Re: 44 bhp :o

Post by mick41zxr »

Do a leak down test & check your valve clearances. In stock config you should hit 61/62 hp sae corrected.
You must be stretching the throttle cables trying to keep up with that shocking shocking
alanh
Posts: 100
Joined: Fri Jul 23, 2010 10:50 pm
My Bike: zxr400 L racebike/R1

Re: 44 bhp :o

Post by alanh »

mick41zxr wrote:Do a leak down test & check your valve clearances. In stock config you should hit 61/62 hp sae corrected.
You must be stretching the throttle cables trying to keep up with that shocking shocking
cable, q.a.t with no return ;) but yeah kicking the spuds off it and still a sitting duck on the straights
zxr400L Race Bikes Competing in EDIASIA F400 and thunderbikes with BMCRC in 2016 and an RD125LC MK1 restoration project
monstermotogp
Posts: 21
Joined: Tue Apr 16, 2013 11:24 pm
My Bike: zx7r

Re: 44 bhp :o

Post by monstermotogp »

44 bhp? are you sure its not restricted thats a huge loss?
john
alanh
Posts: 100
Joined: Fri Jul 23, 2010 10:50 pm
My Bike: zxr400 L racebike/R1

Re: 44 bhp :o

Post by alanh »

Nope revs to 14500ish and no washers in Inlets. Will see how it goes with fresh carbs as the fuelling was really bad, failing that I'll have to check clearances etc.
zxr400L Race Bikes Competing in EDIASIA F400 and thunderbikes with BMCRC in 2016 and an RD125LC MK1 restoration project
monstermotogp
Posts: 21
Joined: Tue Apr 16, 2013 11:24 pm
My Bike: zx7r

Re: 44 bhp :o

Post by monstermotogp »

Let us know how it goes! But likei said 44bhp sounds drastic.
john
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banner001
Track day God
Track day God
Posts: 2536
Joined: Sat Sep 24, 2011 3:27 pm
My Bike: ZXR400 L4
Location: Nuneaton

Re: 44 bhp :o

Post by banner001 »

my road bike was 54bhp with terrible fuelling, standard air filter/downpipes/restricted exhaust and a chain that was almost smacking off the rear sprocket...something must be very off with yours :D

that reminds me, i need to dyno mine now with the 105 mains...
UK ZXR400 L3 (1993) - Fully restored and on the roads, my green beast!
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said :smt003
alanh
Posts: 100
Joined: Fri Jul 23, 2010 10:50 pm
My Bike: zxr400 L racebike/R1

Re: 44 bhp :o

Post by alanh »

Throttle linkage was catching, sorted that and 55bhp. Exhaust had more holes in than a teabag so just fitted a micron system, I'll get it jetted and on rr in next few weeks and see how much better it is.
zxr400L Race Bikes Competing in EDIASIA F400 and thunderbikes with BMCRC in 2016 and an RD125LC MK1 restoration project
monstermotogp
Posts: 21
Joined: Tue Apr 16, 2013 11:24 pm
My Bike: zx7r

Re: 44 bhp :o

Post by monstermotogp »

Glad to here you are back on track alan.
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