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building a stroker 6.25 with 84mm pistons

This is a discussion about building a stroker 6.25 with 84mm pistons within the Suzuki Hayabusa section, where you will Some say Busa's Dominate; Originally Posted by TurboR How often did you change the oil? What did you have for oil mods? Oil pump gear? Oil pressure valve? You may think this is a little OCD, but the key

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    Quote Originally Posted by TurboR View Post
    How often did you change the oil? What did you have for oil mods? Oil pump gear? Oil pressure valve? You may think this is a little OCD, but the key to a stroker motor living is frequent oil changes. Frequent as in every trip to the track. Just my honest opinion. It works for me on my small bike. I highly suggest a non stroked motor though if you are not going to do frequent oil pan inspections and want to still be streetable.
    Only had one oil change during the 30 passes. No oil mods.

    Now I change oil every other trip to the track and I drop the pan. But it should be about to take 15 passes on the same oil without blowing. All I know is that they are finicky and I wouldn't do it again unless I was planning on running some really serious numbers with hopes of making the money back.
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    Quote Originally Posted by TurboR View Post
    How often did you change the oil? What did you have for oil mods? Oil pump gear? Oil pressure valve? You may think this is a little OCD, but the key to a stroker motor living is frequent oil changes. Frequent as in every trip to the track. Just my honest opinion. It works for me on my small bike. I highly suggest a non stroked motor though if you are not going to do frequent oil pan inspections and want to still be streetable.
    I dont mind the frequent oil pan inspection and it is not going to be a streetbike.But I do hope for more than 30 passes between eventual engine teardowns. otherwise my brokeass budget/common sense wont allow me to build this engine anyway(forget common sense)
    my hopes are that if i build this one i can race it for a season while saving/looking for a good head/cams and then do a rebuild
    How many passes would you guys say this size strokers have in them before they need to be freshened up(I mostly run 1/8) I know its very different from engine to engine

    thanks to everybody for the interest and info

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    Also depends on how its put together. I had a 8.5 in my bike,& after 40 passes tore it down and the bearing still looked brand new!
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    Build it right to start with and never question it... put a GOOD oil guage on it. keep a eye on the guage when you see psi falling off. tear it down... change oil depending on how you are on not having to change clutches...if you swap clutch plates alot change the oil alot..

    take this how you like... if your broke, don't build outside your means or you will be down longer as it will take more to fix when you tear stuff up... you got a good crank in bike, get some rods, do a nice head and cams and keep racing. when your funds get right put pistons in. the crank not costing you a dime so it can sit. when you feel you ready put crank in,sell your stock gen2 and buy pistons with money now you got what you want, you got what you could afford and raced the whole time.. GOOD LUCK NO MATTER WHAT YOU CHOOSE. JUST MY OPINION, NOT GONNA AFFECT MY WALLET EITHER WAY....
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    I would hold off doing the 1535 until you get some rods.. Hold onto your crank don't get rid of it.
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    Quote Originally Posted by ISPY View Post
    Also depends on how its put together. I had a 8.5 in my bike,& after 40 passes tore it down and the bearing still looked brand new!
    Guess thats why i still have never built a big motor for anything, we make About 30 passes every friday night for test and tune plus all my racing in a season so about 400 to 500 passes a year easy. wonder how many passes a factory motor can actually take?

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    Quote Originally Posted by Bently View Post
    Guess thats why i still have never built a big motor for anything, we make About 30 passes every friday night for test and tune plus all my racing in a season so about 400 to 500 passes a year easy. wonder how many passes a factory motor can actually take?
    I've had 700-800 this year on my stock motor.
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    Quote Originally Posted by Ridehard View Post
    I've had 700-800 this year on my stock motor.
    Yup hard to beat a stock motor! I know they dont win any grudge races but it's more fun for me to make runs and not work on it.

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    Quote Originally Posted by Big J View Post
    I would hold off doing the 1535 until you get some rods.. Hold onto your crank don't get rid of it.
    Don't listen to Big J! You can sell me it to me. I would like to have another!
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    Quote Originally Posted by Bently View Post
    Yup hard to beat a stock motor! I know they dont win any grudge races but it's more fun for me to make runs and not work on it.
    I aint gona lie, i honestly had more fun racing my slow stock bike than i have the last several years with my money pit
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    first of all thanks alot for all your input on this

    maybe the smartest thing to do for me as things are now is to hold on to the 6,25 and wait to drop it in the engine until its a 1441 with a good head instead of maybe blowing up a stroker engine long before it has reached its full potential
    some of you has recommended better rods,but how much power will the stock rods take(i thought they could take a lot more than forexample what a 1441 makes)i hope that the stock rods will be good enough for a 1441and that other rods can wait until the 6.25 goes in the engine
    what kind/size of cams should i be looking for and where do i find a good head at a fair price?
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    secret to a stroker is the oiling system in the cases. have to increase pressure and volume to the rod bearings, if you rely on the stock oil system it will fail. high volume gear and high pressure valve are not enough. its not designed from suzuki to handle the longer throw of the stroked crank and the leverage at the conrod bigend hence the needed increased oil pressure at the conrod bearing...of course engine bearing oil clearances play a roll along with frequent oil changes. as stated before, its all about how its put together.
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    Stock rods should hold 300hp, but not sure on tq.

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    Quote Originally Posted by Moody View Post
    I aint gona lie, i honestly had more fun racing my slow stock bike than i have the last several years with my money pit
    yup, my SWB 1000 was the bike i've had the most fun with.
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    rod strength or how much they can take isn't totally based on hp you make,size motor over stock,it's based on torque, the conditions of the track you race on, detonation and a few other factors. I say this to say a track that hooks and drags a motor down harder than other tracks will require a better rod and as it stresses them more than a not so good track.. Some never even think about these kind of conditions. I can't give you all the secrets but take this info how you want...
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