First build shopping list.. what have I forgotten?

Just trying to total up build costs before I get in too deep lol. I've made a shopping list for my first build, not sure it's complete. Would love your thoughts on what else I might need to add!
I'm starting with a pretty reasonable roadgoing mountainbike. I'd like to keep as much of it's functionality as a bicycle as possible, as I'll be hitting that kill switch often (It'll be illegal to ride on public roads).
Here's a quick pic of my bike loaded up for a trip to the beach (I've added more cargo space now with front lowrider panniers), this is 70 miles from home.. took me 28 hours to get home against a headwind, including needing a couple of meals and a sleep halfway lol. List follows under pic

Okay so here's the parts I THINK I need to get motoring:

Transformercycles : 69.7cc 2-stroke slant-head motor kit with 8mm studs and NT Speed carb (£200)

Torque wrench (3/8") 10-80NM range (£24)
aftermarket fuel filter (about £5.00)
aftermarket fuel tap (under £10)
Copper Kote for head gasket (£?)
JB Weld or equivalent U.K. product (£?)
Shrink tube 6mm diameter
High temperature silicon hose LONG like on Fabian's bike (£? U.K. supplier?)

U.S.A stuff:
SBP : Head Stud kit M8-1.0 ($10)
SBP : Engine Hardware kit ($10)
SBP : 2 Stroke HD Shifter kit ($200)
SBP : engine sound dampeners ($14)
SBP : Front engine mount large ($15)
SBP : Silicon tube 6" ($7)
SBP : NGK Iridium BPR7HIX or NGK BPR6HIX ($7)
SBP : Carb O-ring and Exhaust gasket ($5)
SBP : Head Gasket 8mm ($5)
Kingsmotorbikes.com : 2.5L Rear gas tank ($25) MAYBE
Kingsmotorbikes.com : centre kickstand ($25)
JNMotors : Jaguar CDI ($75)
JNMotors : HP Walbro Carb Kit +RSE Reed Valve Kit (Stage 1 or 2????) ($190) to fit when I ...
get it professionally ported for best power in mid range revs. (£??)

Make and bolt on some extra cooling fins to the cylinder head and insert silicone sound dampening blocks between all lower fins.
Make a larger chain guard for the jackshaft kit, and one for the left hand side for enhanced trouser safety lol.
Correct the transfer ports according to instructions on dragonfly75.com, using JB weld or equivalent U.K. product.
Make a rain/splash protector for the air filter.

Wing mirror (£10)
Motorcycle helmet (£50-£60)
Wide tyre liners (£?)
FSA Pig Headset (£10)
Probably fit my spare Marzocchi suspension fork too.
Schwalbe Big Apple LiteSkin Kevlar Guard Folding Tyre (£50 pair)


(£365 + a few items not yet priced-up. for local parts)
($588 + shipping. for the U.S.A. parts)
($588 = £355)
(£365 + £363 = £728 + shipping from U.S.A.)


Petroleum-based oil, and castor oil to break in. (£?)
High quality synthetic oil to run.

Nice new rear wheel (<£100) optional.
Schwalbe Ice Spiker Wired Tyre (£70 pair)

I'll try to get all the locally available stuff first so I can check sizes etc before ordering U.S.A. stuff.
It's a bloody expensive hobby this isn't it? hahaha

Anything else you think I need? Anything on here I don't need or is mismatched to the other parts?

 

[FurryOnTheInside]

The Sick Bike Parts chain tensioners should be available sometime in October or early November, and yes, they are (in my opinion) an essential item for the shift kit, or at very least the right hand side chain tensioner.

That's great news! Of course it's essential, it's not a matter of opinion, those chains move fast, and fast lose chains are "not a good idea". I hope they put that in the "deluxe" kit then and leave out the s*dding dual-pull brake lever!

The thermal isolation spacer from Rock Solid Engines is not currently a listed part on their website, so JN Motors does not even know that it exists. You have to contact Tony via email to have this part shipped out to you as an accessory item.

Okay, thanks Fabian. Wil take a while to save up before I can buy the parts that will come from U.S.A. so hopefully by then the spacers will be in production. I will email him and express my intention to purchase the full carb + reed kit and my need to have the spacer and bolts included. Once enough interest is shown (once he and JNM recieves enough emails about it) they'll hopefully invest to put it into production as a stock part of their kit.

 

[Fabian]

Actually the dual-pull brake lever is a very convenient item to have. It gets my tick of approval, though everyone has a different opinion and possibly a different method of execution to achieve a desired result.

 

[Fabian]

One thing i can say about cylinder porting: just because it looks simple, doesn't mean it "is" simple.
To achieve improved porting efficiency without the use of port templates takes many years of experience and specialised porting tools to do it correctly; definitely not a process for the uninitiated home hobbyist.

If the engine is run with the standard exhaust, you will find little if any improvement over a stock standard cylinder; and under this scenario the biggest gains come from a correctly designed (higher compression) combustion chamber (using a billet cylinder head) and a reed valve intake and a correctly designed CDI, like the Jaguar CDI.
These accessory items will yield noticeable improvement in low and midrange torque but top end power will be marginally better at best, though the usable power range makes for a much better riding experience as well as improved engine life and reliability.