.: XT660.com - The #1 XT660 Resource :. - View Single Post - OTR Cylinder head + Racing Camshaft vs. Reliability

ArtVark · # 7 30-05-11, 23:10

Thanks Kev. All this is way over my head. I have all the 'easy' mods like filters etc, and thought I'd try something a bit more daring. But seeing as I would now need a whole load of mods it would be too much for me.
I have been reading on the forum about upping the compression. I don't understand the principles involved to be honest, but it looks like as the compression ratio gets higher the engine becomes fussier about fuel. And that could cause problems when I'm riding in countries where the fuel has lower than normal octane levels.

You recommended the Stage 3 mod. I had not really thought about it yet, as I am running with K&N and DNA filters already. But comparing numbers, I see could gain as much as 4+ HP by upgrading. And it is a mod I should be able to do myself (was planning to let the garage do the cam mods etc.).
And as there's more air, perhaps a nice combo would be more fuel as well in the form of a +2mm (or maybe even +3, which I saw floating around?)throttle body? I think with the stage 3 and throttle body I should be able to get a nice little final power boost without digging into the internal workings of the engine too much.

I found the threads about the +2mm throttle body conversion from KDS Racing, but KDS Racing does not appear to be around any more. Can anybody recommend an other source for this? I know OTR can do it, but it looks expensive compared to what KDS Racing apparently charged.

I could also look at some other cans, but I think the OTR 2in1 I have is pretty good already, and I have a PCIII as well. Will need a new Dyno run if I do the stage 3 and +2TB, but I don't quite trust my current map anyway...

Thanks for all the advice so far!

edit: And perhaps get a Nology High Power Ignition Cable as well, looks easy enough to do even for me :-)