[SySi]

Yeah, it's a budget bike but it's pretty decent for the money, just a few little niggles but suppose you can't please everyone

So all I should do for a "budget" bike is new exhaust and a suspension upgrade and stop after that, I am also thinking about fitting braided brake lines for better braking feel. would adding an after market air filter make any different to the bike if i don't get the ecu re-tune as well.
as for sprocket change the er6n is 15/46 or 3.07 to 1 if I go down one tooth on the back so 15/45 or 3.00 to 1 I've lost .07 per rotation but hopefully gained slightly longer gearing with out noticeable different in acceleration / torque or is the different so small there is no point doing it and just leave it stock gearing.
What can I do about the shappy / chappy throttle and surging?, is that ecu / fueling fault which need ecu tuned /power commander or mechanical and fixable and able to do you self.
Thank you.

 

[SySi]

I don't like the idea of running the bike without the o2 sensor, won't I need a power commander or ecu flash for that as well?.
I will still try the pair valve and de-snorkel and see how that goes, and if it reduces popping in my after market exhaust. I don't mind a few pops here and there but if it does it all the time than I will do the pair valve mod. I just have to see really how it works out.

As for the suspension upgrade I've found a place only 25-30mins away from me who specialise in motorcycle suspension so might be worth a phone call or pop in and see what they recommend. I like the idea of emulators but I don't know what's more important, new springs and different oil all round or and an emulator and different oil in the front and a new spring on the rear, what would you say?. I'm only a light arse but I find the er6n's suspension harsh at speed but seems to want to dive in/down when going around a bend at a pace. So I thought an emulator might be of use.

For brake lines I've used Wezmoto before so I will use again, and they don't cost much.

 

[SySi]

If your serious about suspension Look at RACETECH they have a great product.
If you want to learn more about how a suspension works Read (((THIS)))

Yeah, I found a place only in the next town from so about 12miles away who do motorbike suspension who do Racetech stuff aswell
might be worth a trip down or a phone call to see what they recommend.

I was thinking of fitting only a HyperPro shock spring too

I've been thinking about Hyper Pro aswell, but as I've said before It might be best if I pop down to a specialist for any recommendations.

 

[SySi]

Yeah I know, but since I don't know about suspension, spring rating and all that I don't feel confident participating it, plus I haven't got anywhere to take the suspension apart. I just want the bike feel planted on the road which will improve rider confidence.

 

[SySi]

Right, I've been on the RaceTech website and they recommend 0.900kg/mm spring for the front (stock is 1.200kg/mm) and 17.80kg/mm for the rear, all that is fine dandy ( presumably I've entered the info correctly) but what oil to use, should I use 5w or 10w or even a thicker oil, as I've mentioned before I am only a light fella at only 10stone which is about 63.50kg or 140 pound, no wonder the stock feels harsh and stiff.

 

[SySi]

I've read on another forum that the higher the VI number the better it holds it viscosity under load is that correct? I suppose it doesn't really matter for road bikes but for race bikes than that's a different matter. I will pop into a local suspension specialist and see what they have to say and do it my self, I might have to rent a workspace somewhere for a few hours though as I haven't got a garage or anywhere (apart from outside) and save myself some money for not paying someone labour fees.

 

[SySi]

What do you guys say to HyperPro? any good! or is it the wrong setup for me. Front spring are progressive and cost £120 with 15w oil the rear is £80-90 or I could use Racetech or Ohlins springs on the rear for around the same price. So what do you think?. I'm not planning in spending much around £200-£230 on a setup better than stock. I know you get what you pay for and can't expect miracles with a small budget.

Update:
Right, I've just flicked through a maintenance book (haynes manual) for the er6n. Can someone correct me if I'm wrong but you can not change the rear spring on er6n as it's one unit. all I want to do is change the spring and not the whole shock.

 

[SySi]

I've emailed HyperPro about their product and got a response

Now this is what they said

"With the front springs it will help indeed.
Our springs are progressive, so give (more) comfort then the original ones.
The rear is a different story: the original rear shock only has about 18mm of stroke,
This is the least of all motorcycle shock absorbers we know, and causes the original shock to have a lot of damping and feel harsh.
Exchanging the entire shock will give you more stroke, and therefore more "space" to the shock to dampen the actual bump.
So then the streetbox that we have would be the best option."

I don't have money to get a completely new rear shock (I'm a tight bugger you see lol), so is it even worth getting a new spring for the rear.

 

[SySi]

I don't know when I'll get around to doing the suspension, but I think I go for the HyperPro front for now and see if the rear needs doing, the rear isn't all that bad really might be a bit too stiff for me but I will see If a rear upgrade Is worth it. The front is another story, yeah it's fine on a smooth road but as soon as you get to an uneven batch, speed bumps, cats eyes ect it is quite harsh, so as I've said I will do the front first when I get round to it.