YPVS 350 CRMC Race Bike

[zakperrin23]

Well i figured i should best make a project thread on here ;D it's not much of a project at the moment, more a collection of bits, and a place to discuss plans!

So i have slowly, since july, amassed a pile of ypvs bits mainly through ebay! infact i have almost a complete bike (in a box)

so the rules for crmc are pretty straight forward...post classic clubman 2:

period forks up to 42mm, period wheels no smaller than 17", any internal work on the engine, but no external modding, and period look! that's the general gist of it.

Plans so far when i return to the uk so far is to get the chassis on it's legs. the swinging arm is being sent away for powdercoating by my dad, so that's all taken care of. For now it'll be a standard shock, but the forks will be fitted with hagon progressive springs, just to help them out a bit! std ypvs wheels, Avon road rider tyres, and possibly fzr 4 pot calipers!

few bit pics..


The frame is a late 1wx Hungarian import, so i beleive it was an F2! i've got the original log book too!


bought a nice smashed in tank for £20. rust free, just needs a paint and the 2 dents pulled out!

this was just to see what the LC race seat would look like on the ypvs....not quite sure on it, but looking at having a ragged edge racing ypvs seat made!!

after I will start the engine work. atm i have a complete engine in bits, which has only set me back £200!! i bought the bottom end off of a user on here, (possibly Andy?) a set of barrels off a mate for 50, and bought a complete pv system, bar electrics, for £60 off ebay the other day.

at first i'll just have the crank and cylinders redone (courtsey Grampian Motors) and possibly the head skimmed/o ringed! then i'll see after that in terms of tuning the bugger. couple ideas on the cards, but depends on budget!!! I currently have a set of Allspeed exhausts, so can't go too mad on the tuning unless i want to buy new spannies!! they need a serious clean though! lol



bodywork will be the last thing......

i'm debating between the ragged edge racing TZ-ST fairing, as seen on Wayne Bond's yamaha Ypvs as below, or naked, or honda rs250 (could fit with modding) or a tzr 250 fairing (almost a straight fit) thoughts??



for design, i'd quite like the yamaha Anniversary scheme as seen in motogp this year!!



thoughts/comments/banter/contributions please


tah.
Zak

[higgsy]

Got the makings of a nice racer there m8, keep the build pics coming

Instead of the Road Riders the AM22/AM23 combination might be a better bet, expensive but so, so good. You'll get half a season out of a set too

[Norbo]

I agree with Higgsy . Id use propper race com tyres you will need them they are not cheep but worth every penny.
If your running ypvs wheels stick with the F2 ones they are lighter then the 31K Type.
Id sell the all speeds as well you need some proper race pipes Nickon lomas or swarbrix .

[zakperrin23]

Cheers for the advice! I was only considering the road riders as i won't get many outings this year tbh. And the allspeeds only set me back 30 quid so an ideal start point for a light tune! Definately considering lomas pipes if i have the pennies! Thanks for the feedback peeps

[higgsy]

Yep, agree with Norbo, the Allspeeds are OK, but a better pipe over tuning any day it will make a big difference. Swarbs, Nikkons detachable Gibsons or Martin 77's in my mind, I wouldn't bother with the Lomas they rev too high for my liking, the old Allspeeds are a good pipe, pretty crash resistant too but they don't really rev high enough for a race bike

I got the YPM horsepower limit on a near stock motor with Martins pipes, just a bit of smooting and blueprinting. PWK28 carbs as well which actually cost an hp or two. But ti's the pipes that determin how a race bike performs in my mind, you want it to drive out of corners on torque and then hold onto that with a combination of power and revs

you don't really want to be revving it much above 10500 really, hence my 'not the Lomas' stance. Beautifully made though.

Use the F2 ignition with an LC coil for relability

[zakperrin23]

Thanks for the good read! I'll definately have a think about it! I have plenty of time lol!
With regards to the ignition i'm actually going for an aftermarket kit which a few of us at crmc use with good results!
I think gibsons could be budget friendly

[zakperrin23]

Recieved an enail back from Tony at Gibsons today. They'll construct a set for me with removable cans for 395! Win! ;D started conposing a shopping list of parts to order, so far i'm up to 600 quid in genuine parts. This will reduce where pattern parts are available!!

Need some advice on the tank though. I either need a good home technique for pulling dents, or a company that offers this

[zakperrin23]

little update:

Coming home next week (for a week's holiday) so it's a chance to do a few things.
plan is starting on getting a rolling chassis together. Ordering Hagon progessive springs, but need to drill the bolt out the bottom of the fork leg as i vaguely remember the head being rounded!

Seat's sorted. Spike at Ragged Edge Racing will be making one for me once he's cleared his backlog, i told him i'm in no rush, but it's one like this


Dad started enquiring for the cylinders for me. The better (cheapest) option, is to have them oversized by 0.5mm then Dad will port them for me. Reedblocks are finished, and possibly buying 34mm mikuni's this weekend

that's where i'm up to for now hopefully pictures next week!

[flames]

are the pics working for everyone else? i aint getting any after the allspeeds.

[JonW]

same here flames...

[zakperrin23]

hmmmm really? :s how strange working for me!

[zakperrin23]

been back this week on holiday from work, so managed to spend some time with my dad today sorting out the ypvs and lc bits, and just chatting bikes

finally checked out the bottom end i bought from Gaz (OneWheelIsEnough) and i never realised i had all the primary gears, and little external bits, and clutch shims!!!! plus on the clutch i bought i have all of that, so i have a few spares



the crank itself is in good nick. just needs new main bearings and oil seals and it's away with the mixer. oh and a good clean up!

mocked up the clip ons, brake mc and throttle, just to keep it all together. Dad's given me a Domino quick action throttle, which will make life easier



seat's all paid for now and arrives tuesday/wednesday (although i'll be back in france by then) so parents will collect that

oh and i have a set of these:



these are okay for trackdays, but CRMC rules on carbs for post classic class states:

There shall be no restriction in the size of carburettors used, but units must be of a type used within the period for racing. Flat slide carburettors are not permitted unless original fitment

so i'm still after 34mm mikunis for race days

but that's where i'm at. plan of attack next is to build a rolling chassis. One of the dog legs i bought is bollocksed. so i need another pair! Swingarm will be painted at my dad's work, and i'll be ordering hagon prog springs for the front.

cheers
Zak