Will gs1000 valvesprings fit a 650 head?

[Guest]

I currently have the head apart, may have to replace the valve springs and was wondering if springs from a 1000 or any of the larger models were the same diameter as the 650 springs and would fit as a replacement?

[Steve]

They all have the same size buckets and shims, so I suspect they will fit, as far as the diameter is concerned, but have no idea about the length and strength.

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[Nessism]

You can check the part numbers here... http://www.alpha-sports.com/suzuki_parts.htm

[ashdricky]

The are different part numbers, I need the length of the 1000 springs 0r 850 springs. I want to make sure there is no valve float, and it was suggested to install stiffer springs. I assumed that the 1000 springs would be stiffer than a 650 as the valves are larger.

[Steve]

Why assume? Download the two manuals from BassCliff's site and compare the specs.

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[brveagle]

There is nothing wrong with the gs650 valve springs... I wouldn't try and reinvent the wheel.

[hampshirehog]

They will fit but I don't think you'll gain anything.

[7981GS]

Why not just buy after market springs?

Daniel

[ashdricky]

I thought the 1000 springs might be stiffer than the 650 springs, and possibly a little cheaper than HD valve springs. how high will the 650 motor rev safely? and is there any advantage to revving it past red line?

[hampshirehog]

Never owned a 650 but a 550 will run well off the top of the rev counter.

[7981GS]

I thought the 1000 springs might be stiffer than the 650 springs, and possibly a little cheaper than HD valve springs. how high will the 650 motor rev safely? and is there any advantage to revving it past red line?

Not with stock: camshafts, compression ratio, intake, exhaust.

Daniel

[srsupertrap]

I would suggest installing a new set of Suzuki GS650 OEM Valve Springs and your concerns will go away. We make the assumption your engine is not built for the drag strip so must of us would state you have no reason to even consider H/D valve springs

I found a OEM set on EBay fairly cheap from S. Africa

[Nessism]

The higher the valve seat pressure the more wear will occur; the valve pounds into the head. Always use the weakest springs that will suit the application. Unless you have aftermarket high-lift cams, I strongly recommend the stock springs.

[ashdricky]

Not with stock: camshafts, compression ratio, intake, exhaust.

Daniel

I was planning on using the cams from the 550 as I've been told they have a little more peak power, and thought higher revs would take advantage of that.

[ashdricky]

but it dose make sense that springs that are too strong, would eventually damage the head