Skip to content
*IMPORTANT NOTICE: Due to increase in fraudulent orders the billing & shipping address must match when placing your order. Thank you for your patience and understanding.
*IMPORTANT NOTICE: Due to increase in fraudulent order the billing & shipping address must match when placing your order. Thank you for your patience and understanding.

Rebuild YFZ450R Big Bore Stroker Motor Build Service 520cc Assemble Your Engine

by BPRATV
Original price $3,134.99 - Original price $3,134.99
Original price
$3,134.99
$3,134.99 - $3,134.99
Current price $3,134.99
YOU SEND US YOUR ENGINE AND WE WILL DO THE REST!  BEWARE OF "COMPANIES" THAT JUST TEAR YOUR ENGINE DOWN, CLEAN THE PARTS, AND PUT IT BACK TOGETHER!  GET THE JOB DONE RIGHT!  BELOW IS A LIST OF THE PARTS AND LABOR INCLUDED:

Complete stock rebuild including cylinder head valve job with the following new parts:
BPR 98mm big bore cylinder
Wiseco JE of CP forged pump gas piston**
Hotrods or Wiseco crankshaft assembly with rod**
Crank bearings
Crank balancer bearings
Water pump bearings
Transmission bearings
Shift cam bearings
Clutch bearings
Clutch arm bearings
Starter clutch bearings
Maxlock TITANIUM head stud kit - LIFETIME WARRANTY*
Complete gasket kit
Cometic MLS head gasket
Complete crankcase oil seal kit
'07+ oil pump
Water pump shaft with impeller
K&N oil filter
Clutch kit
Cam/Timing chain
Timing chain guides
Valve stem seals

Labor included:
Complete teardown and inspection
Clean all parts and flush out cases
Advise on any OEM parts that need replacing
3 angle cut valves and valve seats
Lap valves and assemble head
Sandblast cases and head
Size piston rings to bore
Install cams, shim, and set timing
Add 

Lead time is about 6 weeks from the date we receive your engine.  All parts and the labor we perform come with a 1 year warranty*  Contact us with questions!

The following parts can be added on for an additional cost:
Used assembled cylinder head with Kibblewhite valves and springs $1850
Same head as above except full race ported and polished $2250
Installation for either of the above two heads $250 or $400 to install cams and set timing also
Kibblewhite valves and springs with seals and keepers $425
Hotcams $350
Webcams $600
New OEM clutch cover $120 (Used $50)
These are just a few of the options but there are plenty more so contact us with questions!

WE STAND BEHIND EVERYTHING WE SELL AND DO AND THIS ITEM COMES WITH A 1 YEAR WARRANTY!*

DO YOU MAKE A LIVING WORKING ON BIKES? ARE YOU A SHOP OR DEALER? WOULD YOU LIKE TO GET BETTER PRICING ON THE PARTS YOU SELL?  IF SO CONTACT US AND SET UP A DEALER ACCOUNT!  IT’S FAST AND EASY

Payments:  We accept all forms of traditional and online payment methods available – Cash, MC, AMEX, VISA, DISC, Paypal, Venmo, Cashapp, among others.  Payment can be made online or over the phone.  PRICES ARE SUBJECT TO CHANGE AND LISTINGS MAY BE REVISED AT ANY TIME WITHOUT NOTICE.

**Products we sell: At BPRATV we sell parts from the best names in the industry.  Unless otherwise stated, we will put the quality of the parts we sell up against any other companies’ in the industry.  Also, we stock the same parts from different manufacturers so that when back orders occur like they have been for the last year we have an alternate part to send that is the same quality.  This would be the ONLY reason your order might be slightly different when it arrives. 

 Returns: We accept returns within the first 30 days from the date the item was shipped.  You can return part or all of your order.  All claims for orders sent incorrect, incomplete, or damaged should be made right away by contacting us.  99% of problems can be easily solved without returning the entire order.  Orders returned due to “changed mind” or “parts not needed anymore” are subject to a 10% restocking fee plus a deduction for our cost shipping the order to you.  Any part to be returned must arrive to our facility 100% complete, and all parts must be brand new, never installed, in the original packaging, to receive a refund for them. It is the buyer’s responsibility to ensure returned parts arrive to us in the same condition they were when they left our facility.  Any item returned that does not meet the above conditions will not be refunded.  For more info about returns see the eBay Return Policy. 

 *Warranty: This product is NOT DIY and it is the responsibility of the person installing and tuning the parts to ensure they work correctly.  If you install this engine and do not tune it properly it will fail.  Over 99% of people in the world are not qualified to work on an engine, and we ALWAYS STRONGLY recommend parts be installed by a qualified, experienced mechanic. Warranty for all products we sell does not cover failure that is a result of improper installation, tuning, break in, or misuse.  For any warranty to be considered the part(s) in question must first be sent back to us for inspection, and proof of installation by a professional mechanic must be provided.  We do not warranty parts based on phone calls, photos, emails, what you read online, or another mechanic's assessment alone.

Feedback: Positive feedback is greatly appreciated.  We have changed the way we do business in response to customer concerns and receiving positive feedback when an order goes the way it is supposed to is a huge help.  If you do not feel we deserve positive feedback just contact us and we will do what is needed to help you feel as "positive" as possible about your experience.  Also, we want information from customers when their experience is less than desirable so we know what areas need improvement the most.  Please work with us and we will ALWAYS work with you.

 

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare