Yes...! Stock or after market piston can be used...
It's recommended to use OEM bearings & gaskets due to tested reliability...!!
HotRod stroker crankshaft, main bearing/seals and complete gasket set for complete installation. +3mm stroke. Makes 471cc. >>>Uses stock piston. Bolt in and go!<<<
I ordered the hot rods +3 stroker and 500cc big bore kit from CP Carrillo BP Racing and Athena.
13.1:1 compression before the stroker so around 13.5:1 ratio with the stroker. Though I have my doubts, Carrillo insures me that I can use pump gas. I dont mind making a mixture of 93 and a higher octane gas, but I will not run strait race fuel. I raced for years and i already know that i cant afford that. I'll sell the bike if that's how it goes.
Are you suggesting that i still need to buy stock bearings and gaskets?
Yea! (without the +3 stroker).. The "100mm" Athena kit with 13:1 piston you can remain on pump gas of 93 octane due to increased displacement actually drops the compression 0.2~ 0.3. (like 12.8:1)...
But..!! Your kit is 98mm & with a (+3 stroker)..So plan on 96~100+ octane mixture for 13.4:1 compression ratio to be safe...
Listen for any knocking & pinging when you're up & running...If you do raise the octane before you pre-ignition or detonation occurs...(grenade the engine literally)....!!!
Damn... I was on the phone with athena, and a big distributor and they couldnt get me the 100mm kit alone for like 2 months. I tried and tried to get one and then I came across this kit and thought I may be able to run pump with it. I'm not up to date with it but about 6yrs ago methocyclopentandienal manganese tricarbonal was the best octane booster.
What do you recommend for the times that I dont have race gas and have to up the octane with a booster?
Or do u think its smarter for me to return this and try to find the 2 kits separately?
Have u riden a kfx with a big bore? I was hoping it would make a noticable difference. I'm still going to send my head to be ported, and flattened. So maybe all together it will make a nice advancement.
Shaving your head due to warping will add compression too..how much is determined by how much they shave off...!!!
And remember a +3 stroker crank will increase your compression 0.3~0.5 to a 12.8:1 which will put you at 13:1 or more...94+ octane recommended...so you might need an octane booster..
There sold in pairs so it will be very difficult to find just one left side ...reason many left sides are destroyed/
cracked due to the chain breaking without a poly case saver...!!
That's why there are many rt sides for sale & no lefts side available for there bought quickly on Ebay...5 rights sides on Ebay no left sides...
What kind of seal is used on the oil drain bolts?
The previous builders had both stripped and I'm swapping everything over....
I have both copper washers and rubber prints. I'm going to order an oil plug cuz the one they had isnt right.
I laughed like hell when I saw the oil filters, check this out! And I swear I pulled them just like this!
(Google translate)
What is the + 3stroker? I recently exchanged the crankshaft rod for a forged hotrods. But, could I have installed a longer one?
Answer is no...That both the con-rod & crankshaft pin has been modified to add +3mm to the length to the downward stroke but not to the upward length...
(google translate)
La respuesta es no ... Que tanto el perno de la biela como el del cigüeñal se han modificado para agregar + 3 mm a la longitud de la carrera hacia abajo pero no a la longitud hacia arriba ...
I think lowering the combustion chamber raises the compression. I am having it decked so it will have to slightly lower the combustion chamber, which reduces volume and increases the static ratio.
If I'm wrong please explain.
Definitely deshrouding is the the goal with valves. I've spent so much money on this engine and I hate to put a crazy amount into the head because usually if something goes wrong it likely kills the head and I have to get a new one.
Have any ideas on where to start with the tune? I am using the stock ecu with pcv and autotune.
I had head decked and a mild port job. +3 stroker with 98mm big bore with a 12.8 compression ratio on the piston, which is not already factored in with the stroker making it around 13.1 to 13.3 compression ratio. Stage 2 cams, acell coil, iridium plug, full dasa exhaust, fci intake.
They said they barely took anything off of the head. I will break it in with higher octane gas but I'll try to go down once a few hours are on it. If it wants to detonate than I will sell it. It's a shame that a good amount of power cant be had.... I wish I had known about the rod or I would have swapped in advance!
That is why dust devil tried to have you stay at 12.8
With good oem bearings you will likely get a lot of hours out of it.
You will have to run atleast 100.
If your on a budget use E85. You have to inject 30% more though
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