Fitting different engines?

[BenR]

Hi all just won this -> https://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=230535532682&ssPageName=STRK:MEWAX:IT#ht_774wt_1141 The mounting points look very similar to my 400 does anyone reckon I'll have a great deal of difficulty installing it? Mine's a GSXR400 GK73a.
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Current bikes: suzuki RG125UN wolf. Yamaha MT-07

[MarJay]

Ha. Ha.

Read sig.

Cry.
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British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F; Cheap project: CBR900RR FireBlade
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another.

[BenR]

You really are a bit of a twat aren't you? Every time I read one of your posts you're always slating someone if you've got nothing constructive to add why bother replying??
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Current bikes: suzuki RG125UN wolf. Yamaha MT-07

[Willson]

I wouldn't have thought that would work... The engine is going to be a different size, with things in different places yes?

It would be like trying to fit a ZX9 engine in my ER5...

But good luck with it!
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Riding: '00 Suzuki SV650S. Previous: '99 Kawasaki ER5 - sold, '02 Suzuki GZ125 Marauder - sold

[h00dwink]

to be honest i feel his post was constructive. why didn't you ask before buying?
at least you can sell it on and probably get the money back.
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[Fisty]

It will fit if you spend alot of cash modifying the frame. Its too wide and tall to fit at the moment.
Plus you will need the ECU, loom and various sensors.

Hope you got a large budget.
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[Al]

I know a lot of people do the Thundercat 600 engine into FZR400's without too much of a problem. But have no idea about GSXR's.
The SRAD is a pretty massive bike and the GSX-R400 a pretty tiny one
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[mr-inteligent]

You got a bargin keep the genny and flog the engine.

No it wont fit the gsxr400 but some gsx750's will fit that frame.

[MarJay]

[.....]

I'll never understand some people's logic. Do the deal then ask questions afterwards, just seems a totally odd way of doing things.

[Blau Zedong]

As someone with serious knowledge of GK73A's I concur with Marjay. Even if the frame is wide enough everything else will have to be fabricated, i.e mounts, exhaust....that's without considering fitting carbs, airbox and wiring harness. Then worry about aligning sprockets etc, and hoping the fuel tank will fit over the "installation". If you want a GSXR600 powered bike, than buy a GSXR600.
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18:54:48 Rob Fzs: jews don't give away stuff for free

18:54:59 Rob Fzs: unless its their clothes/ hair/ golden teeth

[Blau Zedong]

https://i5.photobucket.com/albums/y164/BLUEX5/e5250384.jpg

Thanks for the karma bashing, fuckface. I deal in facts, that's all - if you don't like it then why fish for opinion on the most outlandish engine swop in the history of BCF?
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18:54:48 Rob Fzs: jews don't give away stuff for free

18:54:59 Rob Fzs: unless its their clothes/ hair/ golden teeth

[evoboy]

Id of thought a Suzuki oil boiler motor would of been closer to fitting. Even then it may well be of the wrong width to fit that frame.

Why would you want to put a more modern 600 in the older 400 frame? The srad is probably not far off the same weight.
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Suzuki GT250 x7------- Fazer 600------CB250RS------Aprilia Rally 70----- Bandit 600

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[Blau Zedong]

An oil boiler engine wouldn't go into a GK73 (too wide and too tall). I believe it might be possible to fit the WN-WS type water cooled motor, but only to a GK76 which has a high frame like a 750/1100 anyway. As you say, I'm not sure any frankenstein combination would actually be better than the original bike which donated the engine.
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18:54:48 Rob Fzs: jews don't give away stuff for free

18:54:59 Rob Fzs: unless its their clothes/ hair/ golden teeth

[Kal]

[MaybeGuy]

only an absolute fucking retard would take that sentence as gospel (ie someone like marjay).

the bottom line is anything can be made to fit anything. as proven many times on this very forum.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[MarJay]

[hmmmnz]

someone told me there was no way i could get a speed triple swing arm to fit a zxr750 frame, that was all the motivation i needed,

the way i see it is, you have an engine, you have a frame,
why not give it ago, you'll be no worse off than iff you never tryed,
i'd definitly give it a go,

some one put a 750 engine in a vespa, surely this'll be considerably easier
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[DrDonnyBrago]

[Kickstart]

Hi

I would doubt it would fit even vaguely easily.

Unless you want to do a load of fabrication (including a load of allow welding) then the engine mounts will need to be very close. I would doubt they are that close at all. Given that Suzuki changed the engine mountings greatly between the oil cool GSXR750 / 1100 and the water cooled 750 / 1100, it would seem unlikely that they would keep similar mounts between totally different bikes several generations apart.

If you can get it to mount then you need to get the sprockets to line up (and entirely possible you will have to worry about the front sprocket position directing the chain through the swinging arm at the mount). Electrics will require the GSXR750 cdi, etc. Depending on the ignition systems you might find the rev counter doesn't work, or works at half / double the real engine speed. SRAD has downdraft carbs and not sure about that model of GSXR400 but you might not have space for such a setup (let alone an airbox so it works OK). You will need a 750 exhaust bodged to fit (probably one of the easier bits).

As soon as you start chopping stuff up to try and get it to fit you pretty much render it worthless, so easy to lose a load on a half hearted attempt.

God knows what it will handle like with the weight of the 750 engine likely in a different position.

The mentioned FZR400 / 600 swap is easy as the 600 is basically a stretched 400 (probably explains why the 600 engine is a bit weal). Plenty of internal engine bits for the 600 are marked with the FZR400 model code. If the models are closely related (oil cooled GSXR750 / 1100, FZ750 / FZR1000, etc) then engine swaps are likely to be easy.

All the best

Keith
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[hmmmnz]

[Kal]

[BenR]

[Kal]

where I have seen this done before it has been all with all engine ancelleries*, including the carbs and you will almost certainly have to bodge the wiring...

You will probably have issues with the engines breathing so a K&N kit might be worth looking at and getting it jetted to run properly...



* If you dont have them, get hold of them before you take the engine apart. The worst that happens if you don't need them is that you eBay them off again.
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[BenR]