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Post Subject:

XS400 carb swap from later model

Reply from: TOG@Toil
Date: 07 Mar 2008, 15:28
Re: XS400 carb swap from later model

On 7 Mar, 14:16, MisterWhite <84fi...@gmail,com > wrote:
> On Mar 7, 2:27 am, totallydeadmail...@yahoo.co.uk (The Older
>
>
>
> Gentleman) wrote:
> > . <Rhiann...@gmail,com > wrote:
> > > On Mar 6, 2:07?pm, totallydeadmail...@yahoo.co.uk (The Older
> > > Gentleman) wrote:
>
> > > > But in this case, my money is on Krusty not realising that we were
> > > > talking about a shafty, and weighing in with his usual ignorance.
>
> > > What's with this "we" shit? You weren't even in the thread until you
> > > stuck your pointy nose in with disinformation about the XS400 having
> > > ignition points. It didn't.
>
> > http :// shop.wemoto,com /pictures.dyn?u=2147869qqq5827940
>
> > http :// shop.wemoto,com /pictures.dyn?u=2147869qqq5827939
>
> > They made two types
>
> > > And Lester made wheels for BMW's, how do you know they didn't make
> > > them for GS850G's?
>
> > BMW rear wheels were interchangeable between many models, so it was a
> > case of one size fits all. And a lot of BMWs were sold. Also, a lot of
> > BMWs of the era had spoked wheels, so people were in the market for
> > alloy wheels. The GS850G had alloy wheels as standard, and Lester didn't
> > make wheels for them.
>
> > End of.
>
> > --
> > BMW K1100LT  Ducati 750SS  Honda CB400F & SL125
> > GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
> > BOF#30 WUSS#5  The bells, the bells.....
> > chateau dot murray at idnet dot com
>
> I think the pre 80 xs400 had points, 80-81 had this particular CDI,
> and the 82 -> Maxim had another type of electronic ignition.
> Thanks for the help though. I love the GS850, 83 GL with 30K, paid
> $600, in perfect shape. More fun than a barrel of monkeys, save the
> cornering. I think I will check out some shocks, and maybe a softer
> tire. The Dunlops on it are a bit rigid and are about half gone
> anyway. I put some superbike bars on it, and that really made it a lot
> more fun. Next are some new springs, and I will look into shocks. Then
> I will get some tires. So many bikes, so little time.
>

The 850 was a huge heavy lardy thing. We never got the custom version
in the UK, only the pure roadster. I rather liked it, because the
engine was so good. Comfy seat as well. As you say, it didn't corner
too well, but it was a lovely tourer. Good ones are quite sought-after
here.

Reply from: .
Date: 07 Mar 2008, 16:30
Re: XS400 carb swap from later model

On Mar 7, 6:16=EF=BF=BDam, MisterWhite <84fi...@gmail,com > wrote:

>I love the GS850, 83 GL with 30K, paid
> $600, in perfect shape. More fun than a barrel of monkeys, save the
> cornering. I think I will check out some shocks, and maybe a softer
> tire. The Dunlops on it are a bit rigid and are about half gone
> anyway. I put some superbike bars on it, and that really made it a lot
> more fun. Next are some new springs, and I will look into shocks. Then
> I will get some tires. So many bikes, so little time.

The relatively narrow 16XMT2.75 rear wheel limits you to a bias-ply
tire.

Dunlop recommends their 130/90-16 67H GT-501, but the rear rim is
marginally narrow, probably making the tire "crown" a little in the
center, IOW, you might not be able to lean the motorcycle far enough
without going off the edge.

"L"-model motorcycles have an inherent problem with front-rear tire
mismatches, anyway, the front tire has to struggle to cope with
stabilizing the motorcycle while the 16-inch rear tire is continuously
veering off to the right or left.

A friend of mine tried to race a GS450L that he got cheaply. It scared
him so badly, he quit road racing.

http :// www .dunlopmotorcycle,com /tirecatalog_tire.asp?id=3D8

http :// www .mawonline,com /mfglinks.htm

Reply from: flyright1982@gmail,com
Date: 08 Mar 2008, 05:31
Re: XS400 carb swap from later model

On Mar 7, 10:30=C2=A0am, "." <Rhiann...@gmail,com > wrote:
> On Mar 7, 6:16=EF=BF=BDam, MisterWhite <84fi...@gmail,com > wrote:
>
> >I love the GS850, 83 GL with 30K, paid
> > $600, in perfect shape. More fun than a barrel of monkeys, save the
> > cornering. I think I will check out some shocks, and maybe a softer
> > tire. The Dunlops on it are a bit rigid and are about half gone
> > anyway. I put some superbike bars on it, and that really made it a lot
> > more fun. Next are some new springs, and I will look into shocks. Then
> > I will get some tires. So many bikes, so little time.
>
> The relatively narrow 16XMT2.75 rear wheel limits you to a bias-ply
> tire.
>
> Dunlop recommends their 130/90-16 67H GT-501, but the rear rim is
> marginally narrow, probably making the tire "crown" a little in the
> center, IOW, you might not be able to lean the motorcycle far enough
> without going off the edge.
>
> "L"-model motorcycles have an inherent problem with front-rear tire
> mismatches, anyway, =C2=A0the front tire has to struggle to cope with
> stabilizing the motorcycle while the 16-inch rear tire is continuously
> veering off to the right or left.
>
> A friend of mine tried to race a GS450L that he got cheaply. It scared
> him so badly, he quit road racing.
>
> http :// www .dunlopmotorcycle,com /tirecatalog_tire.asp?id=3D8
>
> http :// www .mawonline,com /mfglinks.htm

I don't doubt it. The silly 454LTD I have could easily outperform it,
and it is a cruiser. Scary fast at times, however. Not sure how you
can make a bike that is so comfortable yet so fast and agile. I just
wish I liked the way it looked. I feel like a poser biker riding it.
The XS400 I am building should handle fairly well I hope, although it
also has the mismatched tires. It is lowered about 2.5 inches, and
stripped of everything non-essential. Just got the carbs back
together, so tomorrow hopefully I will have good news.

I really love the 850 though. Even with it's problems, I can't help
it. Sounds like a sewing machine (literally), is a bit of a buffalo.
Valve adjustments are a pain, and I used to lose the shifter sometimes
(bent retaining bolt, took me by surprise. Try getting from a dead
stop back into traffic stuck in 5th gear). Really should have come
with a 6 speed. I really wanted a GT750, but this was what I could get
down in south Georgia. On the highway, like you say, at about 70, it
is a smooth riding machine. The only thing I hate about it is
emergency stops. Very unpredictable. If the rear wheel locks, watch
out. You never know where it is going.

I am thinking about an RD400 or a GT550, any suggestions? I can't
afford an H1 or H2. I really want a 2 stroke race bike. I grew up
riding dirt smokers and would love to have a street bike. My KDX200
would be great, except I can't get it tagged. No title or MSO.

Reply from: .
Date: 09 Mar 2008, 04:56
Re: XS400 carb swap from later model

On Mar 7, 8:31=EF=BF=BDpm, flyright1...@gmail,com wrote:

> I am thinking about an RD400 or a GT550, any suggestions?

If I want to get seriously nervous, it's cheaper to chew guarana
berries...

But the ultimate Japanese two strokes are the Yamaha and Suzuki square
fours,
as I recall they were the RV500 and the RG500. I rode both of them and
realized that ownership would require a serious commitment that I was
unwilling to make.

The RD400 Daytona Special was a very nice final version of the air
cooled Yamaha twins that evolved from the earliest copy of a German
design. I had a 1961 YDS1 and a bastard YDS3 that I assembled in 1967
from various parts obtained from $tealer$hips and $alvage yards.

All of those old Yamahas and the R5 and the RD series that evolved
from them were too small for a person of average size. Even the
Daytona Special felt small to me.

And the water-cooled versions like the LC and the RZ350 were still
small and don't seem to be capable of extended high speed operation at
high RPM on open roads, if Bob Nixon's experience proves anything.

I only remember about two riders that had GT550's with the ram air
cooled heads. The GT750 was a much better long distance road machine,
it liked to run at 90 mph all day, and surged and bucked if I tried to
go slower.

I had lots of confidence in the GT750 chassis, after I installed
bronze swing arm bushings and after market shocks and lighter springs
on the back. I used to go squirreling around on mountain roads with
the RD350 guys.

The short wheelbase made the RD350's prone to wheelstanding when they
came on the power and they would also drag their solid footpeg bar
that ran under the engine, so those guys would cobble up their own
footpegs or install aftermarket rearsets.

But the GT750 was always wearing out tires, brake shoes and chains,
and always needed to have the ignition points cleaned and re-set. I
got tired of all the nit-picking maintenance after a few years

> I can't afford an H1 or H2.

Those things are very expensive nowadays.

> I really want a 2 stroke race bike. I grew up
> riding dirt smokers and would love to have a street bike.

Well, if you don't have to ride very far, and you do most of your
riding on back roads,
an RD400 will probably work just fine.

There are also grey market 2-strokes like Aprilias with Suzuki 250
motors and Honda triples. I think the triples were NS250's.

If you can find somebody who have gotten an Aprilia registered for the
street in any state, it might be worth considering, even if it does
cost $5K.

Some local riders bought the grey market two strokes to ride on the
Angeles Crest Hwy above Pasadena. The 2-strokes are so thirsty, they
can barely make it 25 miles up to the roadhouse at Newcombs Ranch,
then they have to go back down the hill to buy gasoline.

But the short wheelbase 2-strokes don't need to lean so far over to go
through a turn, so they can go around the curves very easily.

Reply from: paul c
Date: 09 Mar 2008, 08:58
Re: XS400 carb swap from later model

. wrote:
> On Mar 7, 8:31?pm, flyright1...@gmail,com wrote:
>
>> I am thinking about an RD400 or a GT550, any suggestions?
>
> If I want to get seriously nervous, it's cheaper to chew guarana
> berries...
>
> But the ultimate Japanese two strokes are the Yamaha and Suzuki square
> fours,
> as I recall they were the RV500 and the RG500. I rode both of them and
> realized that ownership would require a serious commitment that I was
> unwilling to make.
>
> The RD400 Daytona Special was a very nice final version of the air
> cooled Yamaha twins that evolved from the earliest copy of a German
> design. I had a 1961 YDS1 and a bastard YDS3 that I assembled in 1967
> from various parts obtained from $tealer$hips and $alvage yards.
>
> All of those old Yamahas and the R5 and the RD series that evolved
> from them were too small for a person of average size. Even the
> Daytona Special felt small to me.
>
> And the water-cooled versions like the LC and the RZ350 were still
> small and don't seem to be capable of extended high speed operation at
> high RPM on open roads, if Bob Nixon's experience proves anything.
>
> I only remember about two riders that had GT550's with the ram air
> cooled heads. The GT750 was a much better long distance road machine,
> it liked to run at 90 mph all day, and surged and bucked if I tried to
> go slower.
>
> I had lots of confidence in the GT750 chassis, after I installed
> bronze swing arm bushings and after market shocks and lighter springs
> on the back. I used to go squirreling around on mountain roads with
> the RD350 guys.
>
> The short wheelbase made the RD350's prone to wheelstanding when they
> came on the power and they would also drag their solid footpeg bar
> that ran under the engine, so those guys would cobble up their own
> footpegs or install aftermarket rearsets.
>
> But the GT750 was always wearing out tires, brake shoes and chains,
> and always needed to have the ignition points cleaned and re-set. I
> got tired of all the nit-picking maintenance after a few years
>
>> I can't afford an H1 or H2.
>
> Those things are very expensive nowadays.
>
>> I really want a 2 stroke race bike. I grew up
>> riding dirt smokers and would love to have a street bike.
>
> Well, if you don't have to ride very far, and you do most of your
> riding on back roads,
> an RD400 will probably work just fine.
>
> There are also grey market 2-strokes like Aprilias with Suzuki 250
> motors and Honda triples. I think the triples were NS250's.
>
> If you can find somebody who have gotten an Aprilia registered for the
> street in any state, it might be worth considering, even if it does
> cost $5K.
>
> Some local riders bought the grey market two strokes to ride on the
> Angeles Crest Hwy above Pasadena. The 2-strokes are so thirsty, they
> can barely make it 25 miles up to the roadhouse at Newcombs Ranch,
> then they have to go back down the hill to buy gasoline.
>
> But the short wheelbase 2-strokes don't need to lean so far over to go
> through a turn, so they can go around the curves very easily.


A guy from Britain told me that the RD350's caused a change in the UK
graduated licensing laws because because newly-licensed teenagers could
immediately outdrag most cars if they had one of those bikes.
Apparently before they came out, the authorities equated displacement
with speed. Is this true?

I got a kick out of taking apart an old Suzuki (IIRC) 500cc engine that
had two crankshafts. You could see how it was actually two of their
250cc two-stoke engines put together. Maybe somebody here can remember
the model (I think the nickname for the smaller one was Gamma) but
apparently both are quite prized now.

Reply from: The Older Gentleman
Date: 06 Mar 2008, 20:03
Re: XS400 carb swap from later model

. <RhiannonX@gmail,com > wrote:

>
> Your Yamaha wouldnot have a real CDI, which means "capacitor discharge
> ignition", but ignorant mechanics and parts counter dorks have gotten
> into the habit of calling transistor ignition modules "CDI" and we're
> stuck with it.

And ignorant dorks don't realise that the XS400 was points ignition.....


--
BMW K1100LT Ducati 750SS Honda CB400F & SL125
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5 The bells, the bells.....
chateau dot murray at idnet dot com

Reply from: .
Date: 07 Mar 2008, 02:08
Re: XS400 carb swap from later model

On Mar 6, 11:03=EF=BF=BDam, totallydeadmail...@yahoo.co.uk (The Older
Gentleman) wrote:

> And ignorant dorks don't realise that the XS400 was points ignition.....

Maybe those ignorant dorks are British dorks.

Item #18 IGNITOR UNIT ASS'Y 1 $482.21 Call Us



Reply from: The Older Gentleman
Date: 07 Mar 2008, 08:27
Re: XS400 carb swap from later model

. <RhiannonX@gmail,com > wrote:

> On Mar 6, 11:03?am, totallydeadmail...@yahoo.co.uk (The Older
> Gentleman) wrote:
>
> > And ignorant dorks don't realise that the XS400 was points ignition.....
>
> Maybe those ignorant dorks are British dorks.
>
> Item #18 IGNITOR UNIT ASS'Y 1 $482.21 Call Us

http :// shop.wemoto,com /pictures.dyn?u=2147869qqq5827940

http :// shop.wemoto,com /pictures.dyn?u=2147869qqq5827939

They made two types :-/

--
BMW K1100LT Ducati 750SS Honda CB400F & SL125
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5 The bells, the bells.....
chateau dot murray at idnet dot com

Reply from: The Older Gentleman
Date: 06 Mar 2008, 20:03
Re: XS400 carb swap from later model

MisterWhite <84fiero@gmail,com > wrote:

> Thanks a ton. You really know your stuff. I sort of figured the same
> thing about the CDI,

The XS400 was points ignition.


--
BMW K1100LT Ducati 750SS Honda CB400F & SL125
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5 The bells, the bells.....
chateau dot murray at idnet dot com

Reply from: .
Date: 07 Mar 2008, 02:12
Re: XS400 carb swap from later model

On Mar 6, 11:03=EF=BF=BDam, totallydeadmail...@yahoo.co.uk (The Older
Gentleman) wrote:

> The XS400 was points ignition.

Wrong.



Reply from: The Older Gentleman
Date: 07 Mar 2008, 08:27
Re: XS400 carb swap from later model

. <RhiannonX@gmail,com > wrote:

> On Mar 6, 11:03?am, totallydeadmail...@yahoo.co.uk (The Older
> Gentleman) wrote:
>
> > The XS400 was points ignition.
>
> Wrong.

http :// shop.wemoto,com /pictures.dyn?u=2147869qqq5827940

http :// shop.wemoto,com /pictures.dyn?u=2147869qqq5827939

Heh. They made two types :-/

--
BMW K1100LT Ducati 750SS Honda CB400F & SL125
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5 The bells, the bells.....
chateau dot murray at idnet dot com


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