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rusty Group: Members Posts: 92 Joined: Dec. 2004 Posted: June 01 2008,21:02 Has anyone got any pics of the SPR oil pump? my bike was changed to pre mix and I would like to see how and where it goes. Thanks Back to top

Andy Bush Group: Members Posts: 128 Joined: Oct. 2005 Posted: June 02 2008,14:32 Rusty, There are some good pictures and set up info in the workshop manual .......... if i remeber right.....I used it last time i worked on the newer electronic controlled pump. You could always go with the simpler 'R' spec cable controlled pump. ?? download from pure-2-stroke-spirit Andy Back to top

rusty Group: Members Posts: 92 Joined: Dec. 2004 Posted: June 03 2008,20:48 Thanks for your help Andy, I could not find that site recently for some reason, got it now though! Good idea about the "R" pump, I think the SPR pump was for emission reasons only? Thanks again. Russell Back to top

Warwickb Group: Members Posts: 1911 Joined: Sep. 2003 Posted: June 03 2008,22:15 Suspect you're right about the emissions bit, Russ. I'd certainly be looking at trying to lose the additional electrickery if the pump looks to work OK - and has a cable connection to the Powervalve position etc - without it. -------------- A garage overflowing with old stinkers... Back to top

jools Group: Members Posts: 1221 Joined: Oct. 2005 Posted: June 03 2008,22:45 If it hasn't you can always add the cable and powervalve servo off the R. Are the air solenoids oerated at the same points though ? different CDI, different carbs....................... -------------- "The only thing worse than being talked about is not being talked about...." oscar Wilde Back to top

Warwickb Group: Members Posts: 1911 Joined: Sep. 2003 Posted: June 03 2008,23:24 Would that have any bearing on oil delivery though, Jools? Whilst the air solenoids would affect the fuelling to an extent - by altering the amount of air going to the bleed nozzle, I'm not so sure it'd affect the lubing so much? Or am I missing something here? Wouldn't be surprised if I was Cheers Wb -------------- A garage overflowing with old stinkers... Back to top

jools Group: Members Posts: 1221 Joined: Oct. 2005 Posted: June 04 2008,05:14 Of course not ya numpty!! I was refferring to the fact that the SPR may instruct the pump to deliver more on the over run, like the R models do where the short power valve servo cable only operates the autolube cable on the    R - have a look at it. When the throttle is shut on the move, the power valves close. If the CDI senses this and the revs are high it assumes the motor is in overun and opens the power valves which in turn advances the oil pump. Or something like that. If the SPR doesn't have this mechanical arrangement it may do it some other way or not bother. So by going to an R pump setup you need to make sure you all the bells and whistles - possibly the CDI too ?? -------------- "The only thing worse than being talked about is not being talked about...." oscar Wilde Back to top

Warwickb Group: Members Posts: 1911 Joined: Sep. 2003 Posted: June 04 2008,12:09 Right. Gotchya. I'd be very surprised if the SPR powervalve doesn't work in much the same way though in terms of keeping the PV's open (and thus oil delivery higher - assuming it has the cable connection to teh PV servo) with a closed throttle but higher revs. The whole system (as I see it in any case) is designed to provide enough lube when running high revs on a closed throttle - shutting of at the end of a long high speed run or running downhill with a closed throttle etc., which was always the killer with premix and the early, pretty primitive autolube systems that were simply throttle position linked. Worth bearing in mind though, and easy enough to test in any case I'd think. Cheers Wb -------------- A garage overflowing with old stinkers... Back to top

jools Group: Members Posts: 1221 Joined: Oct. 2005 Posted: June 04 2008,13:02 Thats why I run big pilot jets in my racers - that wee bit of security when shutting down after the long straights into the hairpins   -------------- "The only thing worse than being talked about is not being talked about...." oscar Wilde Back to top

Warwickb Group: Members Posts: 1911 Joined: Sep. 2003 Posted: June 04 2008,13:31 Yup. I guess that's why the sugo manual suggests 30 or 35 pilots. Interestingly though TZs tend to run them quite a bit smaller - 22.5 being pretty common as I understand it. Currently running 27.5s in mine, but I plan to try some 30s and 35s (for the reasons you suggest) to see how it feels off the stop. If it's still reasonable, I'll go up a bit on the 27.5s for the added safety margin. Cheers Wb -------------- A garage overflowing with old stinkers... Back to top

jools Group: Members Posts: 1221 Joined: Oct. 2005 Posted: June 05 2008,05:13 According to the 3XVC manual it doesn't have that cable connection to the servo motor............... So it must do it electronically if at all, -------------- "The only thing worse than being talked about is not being talked about...." oscar Wilde Back to top

Warwickb Group: Members Posts: 1911 Joined: Sep. 2003 Posted: June 05 2008,12:45 Right, that poses a problem then, doesn't it. I guess it'd be difficult to retro-fit the R servo (or even just the R pully) as the SPR uses the 4 cable PV set-up, doesn't it? And if you were to remove the electronic control box without there being a throttle/PV cable link of some sort I can't see how the pump would be effectivley controlled.  Having never seen one close up I assumed they were primarily cable operated in the same way as the early set-up but with additional electronic control, not entirely electronically controlled. Bummer... Wb -------------- A garage overflowing with old stinkers... Back to top

jools Group: Members Posts: 1221 Joined: Oct. 2005 Posted: June 05 2008,22:46 I dunno the wiring diagram is not very clear. I suspect there is just a boost solenoid that increases the oil flow on demand from the CDI perhaps ? So, no it probably is not a good idea to use R stuff, lots of little differences all add up to a major potential bang maybe ?? -------------- "The only thing worse than being talked about is not being talked about...." oscar Wilde Back to top

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