building a srx motor soon

mattyg1405

mattyg1405

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so im about to buy(already have a deposit on it , just have to make final payment) a good bottom end to replace a motor that seized a piston then put the rod through the crank cases a couple times

so i bought a good bottom end with 19xx miles on it, only thing is its a 98-99 and i have a 2000 sled so im going to have to move the stator pickup.

so i have 2 good (atleast they look good) cylinders and pistons i have to find one more piston and cylinder, then my plan is to get them trail-ported and put this thing together...

anyone know what i can expect to generate for horsepower on trail safe jetting on a "healthy" trail ported engine?

i know ill have a bunch of questions for mrViper if hes still available to port my cylinders by the time i get the other one such as jetting and setup but if anyone could point me in the direction to find a good deal on a gasket set, and ring-set, wristpin bearings, and etc...
it would be greatly appreciated

any advice from others?
 

You can expect around 150hp, with good port job, Don willpoint you in the right direction.
 
You can get way more then a 150hp from a port job.
Just bringing the cylinders into spec with pout porting you will be at a 150hp.
 
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fusion 69 said:
You can expect around 150hp, with good port job, Don willpoint you in the right direction.
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No this is your quote. I'm saying with a good port job you will be in the 160hp range.
 
With a trail sled and trail jetting? ain't gonna happen, been there done that, got the dyno sheets to prove it.
 
OH 100% YOU WILL CLOSE TO IF NOT AT 160 WITH A GOOD PORT JOB. IF JETTED CORRECTLY AND HOT PIPE, VERY POSSIBLE. I MADE 156 ON MY 2000 WITH BLUEPRINT AND RACE BOX. 3:16 (yammie tony)
 
i have two srx's
the one im building the motor for , or should i say collecting the parts to build the motor i want to run better than my stock sled
i plan on porting the cylinders, and most likely sticking with the stock pipes .unless i find a set used

ive thought about the 780 route as well but i just cant see spending thousands of dollars when i will never see a dollar of that money back when i sell it if i sell it.
 
ive thought about the 780 route as well but i just cant see spending thousands of dollars when i will never see a dollar of that money back when i sell it if i sell it.[/QUOTE]


I don't know what you think it will cost you to do the porting, headwork, buy pistons,rings,gaskets and clutching components, but I do know you can get a complete Hauck 800 kit for $1599. which will give you 165hp with alot more torque than a ported 700 bore engine. When I did mine they even threw in their #5 clutch kit. Just saying do the math before you decide.....
 
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titanrcr said:
ive thought about the 780 route as well but i just cant see spending thousands of dollars when i will never see a dollar of that money back when i sell it if i sell it.
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I don't know what you think it will cost you to do the porting, headwork, buy pistons,rings,gaskets and clutching components, but I do know you can get a complete Hauck 800 kit for $1599. which will give you 165hp with alot more torque than a ported 700 bore engine. When I did mine they even threw in their #5 clutch kit. Just saying do the math before you decide.....[/QUOTE]
haucks 780 comes with ported cylinders and makes 165 hp on stock pipes? and stock ign. timing ?
 
mattyg1405 said:
I don't know what you think it will cost you to do the porting, headwork, buy pistons,rings,gaskets and clutching components, but I do know you can get a complete Hauck 800 kit for $1599. which will give you 165hp with alot more torque than a ported 700 bore engine. When I did mine they even threw in their #5 clutch kit. Just saying do the math before you decide.....
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haucks 780 comes with ported cylinders and makes 165 hp on stock pipes? and stock ign. timing ?[/QUOTE]

That is a GREAT deal on a big bore kit, but theres some things you didnt figure in, thats "exchange" for your stock parts,meaning you cant go back to stock if you sell the sled or have problems. You would still need the gaskets and the clutching componets no matter what way you went so you cant add those in either comparing a 700 to a 780 kit.

700 port job would be porting the cylinders, machining the heads and modding pistons, it all comes in the price. This averages about $500-600 depending where you get it done.

big bore kit is $1599(still a great price) but thats still almost 3 times as much

clutch componets, base gasket and o-rings still needed for either option.

780 with stock pipes,stock carbs will make (good set up would be around 160-165hp), or about 10hp more then a equally ported 700 will, it does however make more torq. of course thru out the powerband from the larger displacement. You also must be well disciplined to own a 780 and let them warm up very well before riding the sled. If your a guy who rips out of the parking lot after you release the pull cord stay away from a 780 because youll have nothing but problems. Good warm ups, good fuel (octane) and safe jetting specs, a 780 is a reliable engine and make good power. Get even a litle bit of detonation from gas octane being low or lean jetting and the pistons will rattle in the bore and crack the now thinner skirts from being bored out, you then have engine failure. :o|
I dont mean to scare anyone, as a 780 is a sweet engine but you need to know some of the downfalls before spending 3 times more money.

As with any other kind of motorsports, its all about how much money you spend as to how fast your gonna go, now you just have to pick your poison ;)!
 
Okay Yammiegod, you made 156hp., now, take away blue print and race box and what do you have for hp. now? prob. around 150hp. correct? This is trail safe as he stated, No perfect jetting and 100 octane fuel, everyday rider.
 
i think for this motor, im going to rely on it in the toughest of conditions , im leaning towards porting as i think it will give me maximum reliability.

so off to search for another cylinder and piston...

on a different note if a cylinder needs replating how much does it cost and who does it ?
 
mattyg1405 said:
i think for this motor, im going to rely on it in the toughest of conditions , im leaning towards porting as i think it will give me maximum reliability.

so off to search for another cylinder and piston...

on a different note if a cylinder needs replating how much does it cost and who does it ?
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millenium technologies in plymouth wisconsin.
 
you say you are going to move the pickup and you may wanna look into this cause i bought a 2000 motor for a 1999 srx and had to remove alot of metal on the cases so it would fit which makes me wonder how exactly you are going to put that metal back in to move your pickup coil closer for the smaller flywheel. just a thought for ya
 
i dont know yet, but read on this forum it can be done rather easily... maybe mr. viper will chime in i think hes done it before...
 
bkas2724 said:
you say you are going to move the pickup and you may wanna look into this cause i bought a 2000 motor for a 1999 srx and had to remove alot of metal on the cases so it would fit which makes me wonder how exactly you are going to put that metal back in to move your pickup coil closer for the smaller flywheel. just a thought for ya
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u just tig weld some aluminium and drills a hole and ur back in business
 
modsrx said:
u just tig weld some aluminium and drills a hole and ur back in business
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so i should be in good shape , as soon as i see it i should be in good shape... ill be sure to post some pics ,.
 
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