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Post by 4l04ever on Feb 5, 2023 0:32:30 GMT 1
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Post by geoffb on Feb 5, 2023 9:36:47 GMT 1
I reckon this bike will be great fun 😎
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Post by steve63 on Feb 6, 2023 14:05:53 GMT 1
Ah so 80hp "when RAM air is pressurised" so 65 then  "In addition to the standard model " Ninja ZX-4R ", the lineup includes the " Ninja ZX-4R SE ", which is equipped with accessories such as front fork preload adjustment, quick shifter and smoke shield as standard equipment" Like the 007 Aston Martin? |
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Post by donkeychomp on Feb 6, 2023 22:50:55 GMT 1
It's okay I guess. Rather have my old ZXR400 though.
Alex
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Post by JonW on Feb 7, 2023 0:35:49 GMT 1
Ah so 80hp "when RAM air is pressurised" so 65 then This also seems weird to me, I dont need extra BHP when Im going along the motorway, I need it when Im getting to those speeds lol Saying that, I had a ZX6R with ram air and it made a great noise, but Im thinking it wasnt the ramming of the air that did that, more the sucking of the air perhaps... hmm... perhaps it just made noise as it had the airbox routed to a place that was closer to my ears than normal... I'd not thought about that before. |
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Post by steve63 on Feb 7, 2023 13:54:22 GMT 1
It's okay I guess. Rather have my old ZXR400 though. Alex I've got one in the garage. My lad bought it and we started to sort it out and convert it to a track bike for him. I then dropped the RGV and hurt myself and the whole track day idea sort of went on the back burner. I only did a mile on it before we put it on the bench and it's been there ever since. The well sorted ZXR's have 65 plus and they probably weigh les than the 180kg of these. |
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Post by steve63 on Feb 7, 2023 14:02:28 GMT 1
Ah so 80hp "when RAM air is pressurised" so 65 then This also seems weird to me, I dont need extra BHP when Im going along the motorway, I need it when Im getting to those speeds lol Saying that, I had a ZX6R with ram air and it made a great noise, but Im thinking it wasnt the ramming of the air that did that, more the sucking of the air perhaps... hmm... perhaps it just made noise as it had the airbox routed to a place that was closer to my ears than normal... I'd not thought about that before. Good for the end of Park Straight though. Although an RGV250 weighing 60kg less will out brake it by 100m. 80hp and 120kg would have been a lot nicer. |
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Post by Tobyjugs on Feb 12, 2023 16:39:22 GMT 1
A few years ago (6?) i built up a a 400 motor for a freind. I think it was a ZXR400. The cam, valve springs and valves i think came from Kent Cams. The only thing i do know for sure was after it was finished it made exactly 80 pk on the dyno.
I didn't think that 80 pk was so special.
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Post by midlifecrisisrd on Feb 12, 2023 16:59:46 GMT 1
80 hp is actually quite good I think
If you consider back in the day they raced 400 4 strokes and 250 2 strokes together
Don't think you could get an rgv250 to make 80hp
Suppose the benefit of ram air is that at lower speeds you don't have the wind resistance.
A few horse at speed is useful
Watched videos last week on the 250 and 400 4 cylinders, sounded brilliant
Steve
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Post by midlifecrisisrd on Feb 12, 2023 17:05:50 GMT 1
Just checked and the 250 makes 50hp
Makes a 250 lc sound slow
But then again a 250 ypvs would be easy to get 50 hp at the engine
Steve
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Post by Tobyjugs on Feb 12, 2023 17:17:21 GMT 1
I like to go to Gedinne for the Classic Racing in August. In one class of racing the bike to have is the Kawasaki 400. They are a very competitive bike.
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Post by midlifecrisisrd on Feb 12, 2023 17:25:58 GMT 1
I know a guy who raced in the 400 class
I'm sure it was Kawasaki's he gad
He moved onto mini twins
Steve
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Post by donkeychomp on Feb 12, 2023 22:32:19 GMT 1
My ZXR scared me witless until I stopped trying to ride her as a 2 stroke. Tons of torque, accelerate from 30mph in 6th gear and the power is impressive. Nail it through all the gears and it's a little warp drive bike. Handled superbly too. Hankering after another now but I don't think my lounge can fit any more bikes...
Alex
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Post by steve63 on Feb 13, 2023 18:38:01 GMT 1
Just checked and the 250 makes 50hp Makes a 250 lc sound slow But then again a 250 ypvs would be easy to get 50 hp at the engine Steve Unless that 50hp is on a dyno I would take it with a pinch of salt. My RGV VJ21has a dyno sheet showing 50. Standard except for new silencers. |
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Post by steve63 on Feb 13, 2023 18:47:50 GMT 1
A few years ago (6?) i built up a a 400 motor for a freind. I think it was a ZXR400. The cam, valve springs and valves i think came from Kent Cams. The only thing i do know for sure was after it was finished it made exactly 80 pk on the dyno. I didn't think that 80 pk was so special. I'm sure there is an under 65hp class for the 400's. Discourages tuning and keeps cost down. An 80hp ZXR is doable but not cheap. My mate bought a ZXR as a track bike and brought it to Cadwell. It could pull away from my RGV down the straights a bit but on the dyno he claimed it only had 45hp. With a bit of work it was at 60. No bits added or grinding just attention to valves, plugs, coils and carbs etc. I'll have to put a tiny bit more effort in now but I'll still go past him! |
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Post by steve63 on Feb 13, 2023 18:53:37 GMT 1
80 hp is actually quite good I think If you consider back in the day they raced 400 4 strokes and 250 2 strokes together Don't think you could get an rgv250 to make 80hp Suppose the benefit of ram air is that at lower speeds you don't have the wind resistance. A few horse at speed is useful Watched videos last week on the 250 and 400 4 cylinders, sounded brilliant Steve My mate did the MRO Championship on an RGV. The bike was supposed to have 74. I remember the airbox was the whole of the area around the carbs and the underside of the tank formed the top. It was sealed with ram air intakes. The guy who's bike it was was always throwing money at it. Mainly new cylinders and pistons after the powervalves dropped in. So yes, 80 might be possible but only for 30 seconds! |
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Post by Tobyjugs on Feb 19, 2023 10:20:08 GMT 1
The blue bike at the end of the row is the 80hp 400 cc engined kawasaki.  Sadly it's a bit like the kid in the playground who always gets chosen last when it comes to picking two teams for football.  |
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Dave B
Drag-strip hero
Posts: 240 
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Post by Dave B on Feb 19, 2023 10:52:53 GMT 1
One of my
old work colleagues raced a 400 Kawasaki in the lightweight class and had a lot of success for a couple of seasons. But he spent the whole time frustrated because he could never stay with the GP250 two strokes. These were TZs and Aprilias of course, not tuned road bikes.
Then I retired and he got my job and didn't have time for anything else!
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Post by donkeychomp on Feb 20, 2023 1:16:47 GMT 1
The blue bike at the end of the row is the 80hp 400 cc engined kawasaki. Sadly it's a bit like the kid in the playground who always gets chosen last when it comes to picking two teams for football. It looks scary just parked up. Can I have a go? Alex |
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Post by steve63 on Feb 25, 2023 13:09:27 GMT 1
The blue bike at the end of the row is the 80hp 400 cc engined kawasaki. Sadly it's a bit like the kid in the playground who always gets chosen last when it comes to picking two teams for football. They all look fantastic. As the only four stroke there though it didn't stand much of chance (I'm presuming the Aprillia is an RS250 and not an RSV). |
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Post by Tobyjugs on Feb 25, 2023 13:17:12 GMT 1
The Aprilia is the real deal. The chassis rails are more straighter I think it has two separate cranks.
I've seen it hit 92 PK on the dyno.
It cost a lot of money to buy. The complete exhaust is in a carbon casing with insulation and lots of magnesium engine parts.
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Post by Tobyjugs on Feb 25, 2023 13:25:17 GMT 1
The Number 5 Honda has gone to its new owner in Monaco.
Hmm I wonder who that could be 🤔
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Post by steve63 on Feb 25, 2023 13:25:53 GMT 1
One of my old work colleagues raced a 400 Kawasaki in the lightweight class and had a lot of success for a couple of seasons. But he spent the whole time frustrated because he could never stay with the GP250 two strokes. These were TZs and Aprilias of course, not tuned road bikes. Then I retired and he got my job and didn't have time for anything else! The Supersport 400 class in the UK was 250 2T v 400 4T and the 400's seemed to be the ones to have at least towards the end. I know a real 60 and a bit HP from an RGV/KR1 is relatively easy to achieve but against 80 then even the lighter weight and better braking can't overcome 20hp in the right hands. Give the 250 80hp (one of the GP bikes) and it would turn the tables. When my mate raced an RS125 they used to put 400 SS and 125GP in the same race but start them apart, maybe by around 10/20 seconds. After a few laps he was cutting through the back end of the field of 400's. Great fun for him I've been around Cadwell chasing 250GP bikes on slicks with my 50hp RGV on road tyres and they are rather nippy! They quickly become a dot in the distance . I've chased bikes with more than double my hp and kept with them but those things are in another league. A GP250 held the lap record at Cadwell for many years and maybe would again if they were still being made and raced in top class racing. Now where's that Honda RS250? I wonder if the Mrs would mind me remortgaging the house to raise the money? Probably best not. It would just end at A&E. |
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Post by Tobyjugs on Feb 25, 2023 13:27:30 GMT 1
The blue bike at the end of the row is the 80hp 400 cc engined kawasaki. Sadly it's a bit like the kid in the playground who always gets chosen last when it comes to picking two teams for football. It looks scary just parked up. Can I have a go? Alex Hi Alex it's a really pretty bike when you see it in the flesh. |
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Post by steve63 on Feb 25, 2023 13:31:14 GMT 1
The Aprilia is the real deal. The chassis rails are more straighter I think it has two separate cranks. I've seen it hit 92 PK on the dyno. It cost a lot of money to buy. The complete exhaust is in a carbon casing with insulation and lots of magnesium engine parts. Wow a proper GP Aprillia? I remember 100/110hp being spoken of before they went bore stroke. You could see a kind of cover over the back end of the exhaust on the TV. So that covers all of it? Did they have the disc valve behind the cylinder like the 125? I remember hearing about it on the 125 and couldn't figure out how. I've since seen a kind of twisted belt arrangement. Very clever. Go on then, who bought the Honda? |
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Post by Tobyjugs on Feb 25, 2023 13:33:37 GMT 1
One of my old work colleagues raced a 400 Kawasaki in the lightweight class and had a lot of success for a couple of seasons. But he spent the whole time frustrated because he could never stay with the GP250 two strokes. These were TZs and Aprilias of course, not tuned road bikes. Then I retired and he got my job and didn't have time for anything else! The Supersport 400 class in the UK was 250 2T v 400 4T and the 400's seemed to be the ones to have at least towards the end. I know a real 60 and a bit HP from an RGV/KR1 is relatively easy to achieve but against 80 then even the lighter weight and better braking can't overcome 20hp in the right hands. Give the 250 80hp (one of the GP bikes) and it would turn the tables. When my mate raced an RS125 they used to put 400 SS and 125GP in the same race but start them apart, maybe by around 10/20 seconds. After a few laps he was cutting through the back end of the field of 400's. Great fun for him I've been around Cadwell chasing 250GP bikes on slicks with my 50hp RGV on road tyres and they are rather nippy! They quickly become a dot in the distance . I've chased bikes with more than double my hp and kept with them but those things are in another league. A GP250 held the lap record at Cadwell for many years and maybe would again if they were still being made and raced in top class racing. Now where's that Honda RS250? I wonder if the Mrs would mind me remortgaging the house to raise the money? Probably best not. It would just end at A&E. Yes thats very true about the little Honda. A couple of years ago I saw one racing in the same race as the 400's in Gedinne. I think it came in fourth or fifth. Very impressive for such a tiny bike |
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Post by Tobyjugs on Feb 25, 2023 17:51:14 GMT 1
The Aprilia is the real deal. The chassis rails are more straighter I think it has two separate cranks. I've seen it hit 92 PK on the dyno. It cost a lot of money to buy. The complete exhaust is in a carbon casing with insulation and lots of magnesium engine parts. Wow a proper GP Aprillia? I remember 100/110hp being spoken of before they went bore stroke. You could see a kind of cover over the back end of the exhaust on the TV. So that covers all of it? Did they have the disc valve behind the cylinder like the 125? I remember hearing about it on the 125 and couldn't figure out how. I've since seen a kind of twisted belt arrangement. Very clever. Go on then, who bought the Honda? The answer to your question lies within the number??? |
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Post by Tobyjugs on Feb 25, 2023 17:52:29 GMT 1
What do you reckon Alex is the answer worth a Curly Wurly?
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Post by steve63 on Feb 25, 2023 18:39:22 GMT 1
Wow a proper GP Aprillia? I remember 100/110hp being spoken of before they went bore stroke. You could see a kind of cover over the back end of the exhaust on the TV. So that covers all of it? Did they have the disc valve behind the cylinder like the 125? I remember hearing about it on the 125 and couldn't figure out how. I've since seen a kind of twisted belt arrangement. Very clever. Go on then, who bought the Honda? The answer to your question lies within the number??? The first name that popped into my head was Wayne Gardner. I then googled Wayne Gardner and a few No. 5's popped up along with the number 1 and a few 18's so I'm not sure now. |
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Post by donkeychomp on Feb 25, 2023 22:29:40 GMT 1
Deffo worth a Curly Wurly.
Alex
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