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whittaker727
Well-known member
Who makes a big bore kit for an 06 IQR that would bolt on with no case mods? What if any mods, ie: ignition, carbs, etc. are needed with each kit. Thanks.
IQR big bore kits
- Thread starter whittaker727
- Start date
Go 600HO
It is easier to take out the 440 and bolt the straps on a used 600HO, 660,685,727,797,860 Etc. than bigbore a 440. The reliability of the 440 crank and the cost of the bigbore kit are the two factors of why most people don't do it. All the bigbore kits I've seen for the 440 need the upper case machined so nothing is truely "bolt on." However all 600HO motors are truly "bolt in" using the 440 motor straps. You can even run the 440 airbox.
It is easier to take out the 440 and bolt the straps on a used 600HO, 660,685,727,797,860 Etc. than bigbore a 440. The reliability of the 440 crank and the cost of the bigbore kit are the two factors of why most people don't do it. All the bigbore kits I've seen for the 440 need the upper case machined so nothing is truely "bolt on." However all 600HO motors are truly "bolt in" using the 440 motor straps. You can even run the 440 airbox.
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Vertical
Member
What do you think of converting a 2008 600 IQR with the 800 cfi monoblock? Would this engine be more reliable than the 08-09 D8's?
Umm.......no! The case is the same and you are bolting on an 800 top end, so is it the same motor? Yes. If you want reliable go with a 600 HO.
800 CFi is reliable too, just need to run an aftermarket programmer on it to get the fuel where it needs to be. I have one and it runs stout. The install i was a lot of work though and a 600HO carbs with a 660 kit is the easiest way to get some power going. If it is a later model 08-09, then the 800 cylinder upgrade is the way to go.
Neil
Neil
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Vertical
Member
The bikeman guys are claiming 165 horse out of the carbed 800. Does it have that much more punch than the cfi engine?
Sorry but I believe the info your providing is incorrect. It is NOT the same motor. May want to take into account the fact that in the racer you'll be using carbs vs. efi, and the efi has been shown to be a major contributor to burn downs. However, apparently they are redesigning the 800 piston AGAIN (3rd times a charm right?), so I may wait for them to release this before I bolt my 800 mono conversion together this summer.
You could go with carl's cycles 860 kit or if your worried about piston reliability on the mono block top end, you could drop on slp 727 kit, with the long rod motor you'd have an 797 with dual ring piston and ported cylinders.
I have a 797 built on a ves block and its been trouble free and lays a pretty good smack down.
I have a 797 built on a ves block and its been trouble free and lays a pretty good smack down.
Wait is he talking about a 440 motor? cause if he is I agree with autolodge. the 440 is going to need case mods for anything bigger. And carbs and at least a timing box.
yank it out and look for a 600 ho and build from there.
yank it out and look for a 600 ho and build from there.
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Vertical
Member
Machining would have to be done to the 600R case to accept the 727 cylinders right? Do you have any clue how many horse the 797 makes? As much as the 800 mono?
The 600R won't take the 727 kit, as the 727&797 are designed for the 64mm stroke of the 600VES/HO, while the 600R has a 70 mm stroke. The good news is that the 800 monoblock kit from bikeman for the 600R motor is cheaper than the 727 kit! You might want to wait a few months to see if Poo comes out with a new piston & ring setup for the 800 CFI, as the theory from many is that the single ring piston is a major problem and a fix is coming.
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whittaker727
Well-known member
I should have clarified that, yes, it is a 440.
does 727 not ring a bell
The difference between the 727 and the 797 is the crank, the 797 has the same stroke as the 600r motor. You might have to buy the 777 kit(same bore) to fit that case, but I'm pretty sure the 727 kit will fit.
As you stated the potential downside to the monoblock kit is the single ring pistons, it is however cheaper(I think, I would like to see a cost comparison with porting as the slp cylinders come ported).
Vertical, machining would have to be done with either the mono or the 727 to fit. RMKRIDER has a carls cycle ported mono block in his mountain IQR and I have the 797 in mine, We have not had a chance to run them side by side yet and he was fighting some jetting on his last ride(too fat). I'm hoping to get one more ride in and compare them. The 797 does however, destroy a slp single piped dragon, which isn't really a fair comparison, the IQR is much lighter without the heavy duty factory racing suspension(and I have full holz on mine).
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springer
Member
So let hear from some one that has the Bikeman 800! From my point, it or the Carls kit my be the way to go.If you are starting with the 08 or 09.If not , I agree with everyone else,ditch the 440 and find an 600ho.You will be happier in the end. Pay now or Pay later.The choise is yours. May I suggest that if you are doing an Iqr,don't cut to many coners or you might be redoing them next year. If you do decide to go the 600ho give Chris @ Carls a call.
Go 600ho
This is going to make me sound really old (28yrs) but I have spend a wack of money, time, headaches in the name of more power. Turns out, the IQr chassis is light and agile enough that most people (me being one) can't ride the chassis to it's full potential with a "little" 600HO or mild 660 in it. I realize it sucks to get highmarked, but my 600HO hung with an 09 DragonRMK800 out west in everything except the straight up steep and deep. Granted His sled was box stock and mine was set up for me BUT I will say that I had all the power I needed out there (7-9000FT). I found that riding less power over the years has been easier on my wallet and made me a better technical rider. I don't just get on the lake and squeeze the trigger, I look for a power line, path or gully to try and climb/cross. Sell your 440, and if you shop right, you can pick up a used 600HO or 660 for maybe a grand more. I know there is a 660 on Hardcoresledder. with all the parts to bolt it into an IQR. Damn, as I reread this, I have come a long way from when I owned the PSI995 ProX, OUCH!
This is going to make me sound really old (28yrs) but I have spend a wack of money, time, headaches in the name of more power. Turns out, the IQr chassis is light and agile enough that most people (me being one) can't ride the chassis to it's full potential with a "little" 600HO or mild 660 in it. I realize it sucks to get highmarked, but my 600HO hung with an 09 DragonRMK800 out west in everything except the straight up steep and deep. Granted His sled was box stock and mine was set up for me BUT I will say that I had all the power I needed out there (7-9000FT). I found that riding less power over the years has been easier on my wallet and made me a better technical rider. I don't just get on the lake and squeeze the trigger, I look for a power line, path or gully to try and climb/cross. Sell your 440, and if you shop right, you can pick up a used 600HO or 660 for maybe a grand more. I know there is a 660 on Hardcoresledder. with all the parts to bolt it into an IQR. Damn, as I reread this, I have come a long way from when I owned the PSI995 ProX, OUCH!
